Calcium independent cytosolic phospholipase A2/B enzymes

ABSTRACT

The invention provides a novel calcium-independent cytosolic phospholipase A2/B enzyme, polynucleotides encoding the enzyme and methods for screening unknown compounds for anti-inflammatory activity mediated by the arachidonic acid cascade.

This application is a continuation of application Ser. No. 09/149,988, filed Sep. 9, 1998; which is a divisional of application Ser. No. 08/555,568, filed Nov. 8, 1995 and issued as U.S. Pat. No. 5,976,854; which was a continuation-in-part of the following applications: (1) Ser. No. 08/281,193, filed Jul. 27, 1994 and issued as U.S. Pat. No. 5,466,595; (2) Ser. No. 08/422,106, filed Apr. 14, 1995 and issued as U.S. Pat. No. 5,589,170; and (3) Ser. No. 08/422,420, filed Apr. 14, 1995 and issued as U.S. Pat. No. 5,554,511; all of which are incorporated by reference herein.

The present invention relates to a purified calcium independent cytosolic phospholipase A₂/B enzymes which are useful for assaying chemical agents for anti-inflammatory activity.

BACKGROUND OF THE INVENTION

The phospholipase A₂ enzymes comprise a widely distributed family of enzymes which catalyze the hydrolysis of the acyl ester bond of glycerophospholipids at the sn-2 position. One kind of phospholipase A₂ enzymes, secreted phospholipase A₂ or sPLA₂, are involved in a number of biological functions, including phospholipid digestion, the toxic activities of numerous venoms, and potential antibacterial activities. A second kind of phospholipase A₂ enzymes, the intracellular phospholipase A₂ enzymes, also known as cytosolic phospholipase A₂ or cPLA₂, are active in membrane phospholipid turnover and in regulation of intracellular signalling mediated by the multiple components of the well-known arachidonic acid cascade. One or more cPLA₂ enzymes are believed to be responsible for the rate limiting step in the arachidonic acid cascade, namely, release of arachidonic acid from membrane glycerophospholipids. The action of cPLA₂ also results in biosynthesis of platelet activating factor (PAF).

The phospholipase B enzymes are a family of enzymes which catalyze the hydrolysis of the acyl ester bond of glycerophospholipids at the sn-1 and sn-2 positions. The mechanism of hydrolysis is unclear but may consist of initial hydrolysis of the sn-2 fatty acid followed by rapid cleavage of the sn-1 substituent, i.e., functionally equivalent to the combination of phospholipase A₂ and lysophospholipase (Saito et al., Methods of Enzymol., 1991, 197, 446; Gassama-Diagne et al., J. Biol. Chem., 1989, 264, 9470). Whether these two events occur at the same or two distinct active sites has not been resolved. It is also unknown if these enzymes have a preference for the removal of unsaturated fatty acids, in particular arachidonic acid, at the sn-2 position and accordingly contribute to the arachidonic acid cascade.

Upon release from the membrane, arachidonic acid may be metabolized via the cyclooxygenase pathway to produce the various prostaglandins and thromboxanes, or via the lipoxygenase pathway to produce the various leukotrienes and related compounds. The prostaglandins, leukotrienes and platelet activating factor are well known mediators of various inflammatory states, and numerous anti-inflammatory drugs have been developed which function by inhibiting one or more steps in the arachidonic acid cascade. Use of the present anti-inflammatory drugs which act through inhibition of arachidonic acid cascade steps has been limited by the existence of side effects which may be harmful to various individuals.

A very large industrial effort has been made to identify additional anti-inflammatory drugs which inhibit the arachidonic acid cascade. In general, this industrial effort has employed the secreted phospholipase A₂ enzymes in inhibitor screening assays, for example, as disclosed in U.S. Pat. No. 4,917,826. However, because the secreted phospholipase A₂ enzymes are extracellular proteins (i.e., not cytosolic) and are not specific for hydrolysis of arachidonic acid, they are presently not believed to participate directly in the arachidonic acid cascade. While some inhibitors of the small secreted phospholipase A₂ enzymes have anti-inflammatory action, such as indomethacin, bromphenacyl bromide, mepacrine, and certain butyrophenones as disclosed in U.S. Pat. No. 4,239,780, it is presently believed that inhibitor screening assays should employ cytosolic phospholipase A₂ enzymes which directly participate in the arachidonic acid cascade.

An improvement in the search for anti-inflammatory drugs which inhibit the arachidonic acid cascade was developed in commonly assigned U.S. Pat. No. 5,322,776, incorporated herein by reference. In that application, a cytosolic form of phospholipase A₂ was identified, isolated, and cloned. Use of the cytosolic form of phospholipase A₂ to screen for anti-inflammatory drugs provides a significant improvement in identifying inhibitors of the arachidonic acid cascade. The cytosolic phospholipase A₂ disclosed in U.S. Pat. No. 5,322,776 is a 110 kD protein which depends on the presence of elevated levels of calcium inside the cell for its activity. The cPLA₂ of U.S. Pat. No. 5,322,776 plays a pivotal role in the production of leukotrienes and prostaglandins initiated by the action of pro-inflammatory cytokines and calcium mobilizing agents. The cPLA₂ of U.S. Pat. No. 5,322,776 is activated by phosphorylation on serine residues and increasing levels of intracellular calcium, resulting in translocation of the enzyme from the cytosol to the membrane where arachidonic acid is selectively hydrolyzed from membrane phospholipids.

In addition to the cPLA₂ of U.S. Pat. No. 5,322,776, some cells contain calcium independent phospholipase A₂/B enzymes. For example, such enzymes have been identified in rat, rabbit, canine and human-heart tissue (Gross, TCM, 1991, 2, 115; Zupan et al., J. Med. Chem., 1993, 36, 95; Hazen et al., J. Clin. Invest., 1993, 91, 2513; Lehman et al., J. Biol. Chem., 1993, 268, 20713; Zupan et al., J. Biol. Chem., 1992, 267, 8707; Hazen et al., J. Biol. Chem., 1991, 266, 14526; Loeb et al., J. Biol. Chem., 1986, 261, 10467; Wolf et al., J. Biol. Chem., 1985, 260, 7295; Hazen et al., Meth. Enzymol., 1991, 197, 400; Hazen et al., J. Biol. Chem., 1990, 265, 10622; Hazen et al., J. Biol. Chem., 1993, 268, 9892; Ford et al., J. Clin. Invest., 1991, 88, 331; Hazen et al., J. Biol. Chem., 1991, 266, 5629; Hazen et al., Circulation Res., 1992, 70, 486; Hazen et al., J. Biol. Chem., 1991, 266, 7227; Zupan et al., FEBS, 1991, 284, 27), as well as rat and human pancreatic islet cells (Ramanadham et al., Biochemistry, 1993, 32, 337; Gross et al., Biochemistry, 1993, 32, 327), in the macrophage-like cell line, P388D₁ (Ulevitch et al., J. Biol. Chem., 1988, 263, 3079; Ackermann et al;, J. Biol. Chem., 1994, 269, 9227; Ross et al., Arch. Biochem. Biophys., 1985, 238, 247; Ackermann et al., FASEB Journal, 1993, 7(7), 1237), in various rat tissue cytosols (Nijssen et al., Biochim. Biophys. Acta, 1986, 876, 611; Pierik et al., Biochim. Biophys. Acta, 1988, 962, 345; Aarsman et al., J. Biol. Chem., 1989, 264, 10008), bovine brain (Ueda et al., Biochem. Biophys, Res. Comm., 1993, 195, 1272; Hiroshima et al., J. Neurochem., 1992, 59, 708), in yeast (Saccharomyces cerevisiae) mitochondria (Yost et al., Biochem. International, 1991, 24, 199), hamster heart cytosol (Cao et al., J. Biol. Chem., 1987, 262, 16027), rabbit lung microsomes (Angle et al., Biochim. Biophys. Acta, 1988, 962, 234) and guinea pig intestinal brush-border membrane (Gassama-Diagne et al., J. Biol. Chem., 1989, 264, 9470).

It is believed that the calcium independent phospholipase A₂/B enzymes may perform important functions in release of arachidonic acid in specific tissues which are characterized by unique membrane phospholipids, by generating lysophospholipid species which are deleterious to membrane integrity or by remodeling of unsaturated species of membrane phospholipids through deacylation/reacylation mechanisms. The activity of such a phospholipase may well be regulated by mechanisms that are different from that of the cPLA₂ of U.S. Pat. No. 5,322,776. In addition the activity may be more predominant in certain inflamed tissues over others. Although the enzymatic activity is not dependent on calcium this does not preclude a requirement for calcium in vivo, where the activity may be regulated by the interaction of other protein(s) whose function is dependent upon a calcium flux.

SUMMARY OF THE INVENTION

In certain embodiments, the present invention provides compositions comprising a purified phospholipase enzyme characterized by (a) activity in the absence of calcium; (b) a molecular weight of 86 kD on SDS-PAGE; and (c) the presence of one or more amino acid sequences selected from the group consisting of NPHSGFR (SEQ ID NO:3), XASXGLNQVNK (SEQ ID NO:4) (X is preferably N or A), YGASPLHXAK (SEQ ID NO:5) (X is preferably W), DNMEMIK (SEQ ID NO:6), GVYFR (SEQ ID NO:7), MKDEVFR (SEQ ID NO:8), EFGEHTK (SEQ ID NO:9), VMLTGTLSDR (SEQ ID NO:10), XYDAPEVIR (SEQ ID NO:11) (X is preferably N), FNQNINLKPPTQPA (SEQ ID NO:12), XXGAAPTYFRP (SEQ ID NO:13) (X is preferably S), TVFGAK (SEQ ID NO:14), and XWSEMVGIQYFR (SEQ ID NO:15) (X is preferably A), wherein X represents any amino acid residue.

In other embodiments, the invention provides compositions comprising a purified phospholipase enzyme characterized by (a) activity in the absence of calcium; (b) a molecular weight of 86 kD on SDS-PAGE; and (c) the presence of one or more amino acid sequences selected from the group consisting of YGASPLHXAK, MKDEVFR, EFGEHITK, VMLTGTLSDR, XXGAAPTYFRP and TVFGAK, wherein X represents any amino acid residue.

Certain embodiments provide compositions comprising a purified mammalian calcium independent phospholipase A₂/B enzyme.

In other embodiments, the enzyme is further characterized by activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine (preferably a specific activity of about 1 μmol to about 20 μmol per minute per milligram, more preferably a specific activity of about 1 μmol to about 5 μmol per minute per milligram); by a pH optimum of 6; and/or by the absence of stimulation by adenosine triphosphate in the liposome assay.

In other embodiments, the invention provides isolated polynucleotides comprising a nucleotide sequence selected from the group consisting of: (a) the nucleotide sequence of SEQ ID NO:1; (b) a nucleotide sequence encoding the amino acid sequence of SEQ ID NO:2; (c) a nucleotide sequence encoding a fragment of the amino acid sequence of SEQ ID NO:2 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (d) a nucleotide sequence capable of hybridizing with the sequence of (a), (b) or (c) which encodes a peptide having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; and (e) allelic variants of the sequence of (a). Other embodiments provide an isolated polynucleotide comprising a nucleotide sequence selected from the group consisting of: (a) the nucleotide sequence of SEQ ID NO:16; (b) a nucleotide sequence encoding the amino acid sequence of SEQ ID NO:17; (c) a nucleotide sequence encoding a fragment of the amino acid sequence of SEQ ID NO:17 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (d) the nucleotide sequence of SEQ ID NO:18; (e) a nucleotide sequence encoding the amino acid sequence of SEQ ID NO:19; (f) a nucleotide sequence encoding a fragment of the amino acid sequence of SEQ ID NO:19 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (g) the nucleotide sequence of SEQ ID NO:20; (h) a nucleotide sequence encoding the amino acid sequence of SEQ ID NO:21; (i) a nucleotide sequence encoding a fragment of the amino acid sequence of SEQ ID NO:21 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (j) the nucleotide sequence of SEQ ID NO:22; (k) a nucleotide sequence encoding the amino acid sequence of SEQ ID NO:23; (l) a nucleotide sequence encoding a fragment of the amino acid sequence of SEQ ID NO:23 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (m) a nucleotide sequence capable of hybridizing with the sequence of any of (a)-(l) which encodes a peptide having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; and (n) allelic variants of the sequence of (a), (d), (g) or (j). Expression vectors comprising such polynucleotides and host cells transformed with such vectors are also provided by the present invention. Compositions comprising peptides encoded by such polynucleotides are also provided.

The present invention also provides processes for producing a phospholipase enzyme, said process comprising: (a) establishing a culture of the host cell transformed with a cPLA₂/B encoding polynucleotide in a suitable culture medium; and (b) isolating said enzyme from said culture. Compositions comprising a peptide made according to such processes are also provided.

Certain embodiments of the present invention provide compositions comprising a peptide comprising an amino acid sequence selected from the group consisting of: (a) the amino acid sequence of SEQ ID NO:2; and (b) a fragment of the amino acid sequence of SEQ ID NO:2 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine.

Other embodiments provide compositions comprising a peptide comprising an amino acid sequence selected from the group consisting of: (a) the amino acid sequence of SEQ ID NO:17; (b) a fragment of the amino acid sequence of SEQ ID NO:17 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴]-arachidonyl-phosphatidylcholine; (c) the amino acid sequence of SEQ ID NO:19; (d) a fragment of the amino acid sequence of SEQ ID NO:19 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (e) the amino acid sequence of SEQ ID NO:21; (f) a fragment of the amino acid sequence of SEQ ID NO:21 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (g) the amino acid sequence of SEQ ID NO:23; and (h) a fragment of the amino acid sequence of SEQ ID NO:23 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine.

The present invention also provides methods for identifying an inhibitor of phospholipase activity, said method comprising: (a) combining a phospholipid, a candidate inhibitor compound, and a composition comprising a phospholipase enzyme peptide; and (b) observing whether said phospholipase enzyme peptide cleaves said phospholipid and releases fatty acid thereby, wherein the peptide composition is one of those described above. Inhibitor of phospholipase activity identified by such methods, pharmaceutical compositions comprising a therapeutically effective amount of such inhibitors and a pharmaceutically acceptable carrier, and methods of reducing inflammation by administering such pharmaceutical compositions to a mammalian subject are also provided.

Polyclonal and monoclonal antibodies to the peptides of the invention are also provided.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1: Fractions containing activity eluted from a Mono P column were examined by reducing SDS-PAGE on a 4-20% gradient gel. Activity of each fraction is show above the gel and the 86 kD band is indicated on the silver stained gel. Molecular weight markers are indicated.

FIG. 2: Active fractions from a Mono p/Heparin column were combined and further purified on a size exclusion column. Activity eluted in the 250-350 kD size range. Examination of the fractions by SDS-PAGE under reducing conditions on 4-20% gel indicated only one protein band correlated with activity at 86 kD. Molecular weight markers are indicated.

FIG. 3: Active fractions from Mono P eluate and cPLA₂ (0.1-1.0 μg) were analyzed on two 4-20% SDS gels under reducing conditions run in parallel. One gel was silver stained (1) and in the other gel the proteins were transferred to nitrocellulose. The blot was then probed with an anti-cPLA₂ polyclonal antibody and reactive proteins were visualized with the ECL system (Amersham) (2). Molecular weight markers are indicated.

FIG. 4: The activity of the calcium-independent phospholipase eluted from a Mono P/Heparin column and cPLA₂ were compared under conditions which favor each enzyme; pH 7, 10% glycerol in the absence of calcium and pH 9, 70% glycerol in the presence of calcium, respectively.

FIG. 5: Activity in the cytosolic extracts of COS cells transfected with: no DNA; plasmid (pED) containing no inserted gene; clone 9 in the antisense orientation; and clones 49, 31 and 9 expressed in pED. The extracts were analyzed under two different assay conditions described for the data presented in FIG. 4.

FIG. 6: A comparison of sn-2 fatty acid hydrolysis by activity eluted from a Mono P/Heparin column as a function of the fatty acid substituent at either the sn-1 or sn-2 position and the head group. HAPC, SAPC, PLPC, POPC, PPPC, LYSO and PAPC indicate 1-hexadecyl-2-arachidonyl-, 1-stearoyl-2-arachidonyl-, 1-palmitoyl-2-linoleyl-, 1-palmitoyl-2-oleyl-, 1-palmitoyl-2-palmitoyl-, 1-palmitoyl-, 1-palmitoyl-2-arachidonyl- phosphatidylcholine, respectively. PAPE and SAPI indicate 1-palmitoyl-2-arachidonyl-phosphotidylethanolamine and 1-stearoyl-2-arachidonyl-phosphoinositol, respectively. In all cases the ¹⁴C-labelled fatty acid is in the sn-2 position.

FIG. 7: A 4-20% SDS-PAGE of lysates (5×10¹⁰ cpm/lane) of ³⁵S-methionine labelled COS cells transfected with, no DNA, pED (no insert), clone 9 reverse orientation, clones 9, 31 and 49; lanes 1-6, respectively. Molecular weight markers are indicated.

DETAILED DESCRIPTION OF THE INVENTION

The present inventors have found surprisingly a calcium independent cytosolic phospholipase enzyme, designated calcium independent cytosolic phospholipase A₂/B or calcium independent cPLA₂/B, purified from the cytosol of Chinese hamster ovary (CHO) cells. The activity was also present in the cytosol of tissues and cell extracts listed in Table I.

TABLE I mixed micelle pH 7 liposome pH 7 tissue/cell (pmol/min/mg) (pmol/min/mg) rat brain 1-2 rat heart 0.3-0.5 bovine brain 0.4 pig heart 0.8 CHO-Dukx 10-20 2-5 U937 (ATCC CRL1593) 2 FBHE (ATCC CRL1395) 2 H9c2 (ATCC Ccl 108) 15

The enzyme was originally purified by more than 8,000-fold from CHO cells by sequential chromatography on diethylaminoethane (DEAE), phenyl and heparin-toyopearl, followed by chromatofocussing on Mono P (as described further in Example 1). In addition the activity could be further purified by size exclusion chromatography after the Mono P column. The enzyme eluted from the size exclusion chromatography column in the 250-350 kD range, indicating the active enzyme may consist of a multimeric complex, or may possibly be associated with phospholipids.

The calcium independent phospholipase activity correlated with a single major protein band of 86 kD on denaturing sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) of active fractions from the Mono P and size exclusion chromatographic steps; in the latter no protein bands were observed in the 250-350 kD range. The specific activity of the enzyme is about 1 μmol to about 20 μmol per minute per milligram based on the abundance of the 86 kD band in the most active fractions eluted from the Mono P and size exclusion columns in the mixed micelle assay (Example 3B). The protein band was not recognized by a polyclonal antibody directed against the calcium dependent cPLA₂ of U.S. Pat. No. 5,322,776.

The calcium independent phospholipase of the present invention has a pH optimum of 6; its activity is suppressed by calcium (in all assays) and by triton X-100 (in the assay of Example 3A); and is not stimulated by adenosine triphosphate (ATP) (in the assay of Example 3A). The enzyme is inactivated by high concentration denaturants, e.g. urea above 3M, and by detergents, e.g. CHAPS and octyl glucoside. The calcium-independent phospholipase favors hydrolysis by several fold of unsaturated fatty acids, e.g. linoleyl, oleyl and arachidonyl, at the sn-2 position of a phospholipid compared with palmitoyl. In addition there is a preference for palmitoyl at the sn-1 position over hexadecyl or stearoyl for arachidonyl hydrolysis at the sn-2 position. In terms of head group substituents there is a clear preference for inositol over choline or ethanolamine when arachidonyl is being hydrolyzed at the sn-2 position. Further, as with cPLA₂ of U.S. Pat. No. 5,322,776, there is a significant lysophospholipase activity, i.e. hydrolysis of palmitoyl at the sn-1 position when there is no fatty acid substituent at the sn-2 position. Finally, hydrolysis of fatty acid substituents in the sn-1 or sn-2 in PAPC were compared where either palmitoyl or arachidonyl were labelled with ¹⁴C. Fatty acids were removed at both positions with the sn-2 position having a higher initial rate of hydrolysis by 2-3 fold. This result may indicate sequential hydrolysis of the arachidonyl substituent followed by rapid cleavage of palmitoyl in the lysophospholipid species, which is suggested by the hydrolysis of the individual lipid species. The similar rates of hydrolysis of fatty acid substituents at the sn-1 (palmitoyl) or sn-2 (arachidonyl) positions, where the radioactive label is in either position, is indicative of a phospholipase B activity. However, the fatty acid substituent at the sn-2 position clearly influences the PLB activity, not the sn-1 fatty acid, since hydrolysis of 1,2-dipalmitoyl substituted phospholipids is substantially less than for the 1-palmitoyl-2-arachidonyl species. These results can be clarified by studying the hydrolysis rates at each position of isotopically dual labelled phospholipids, e.g. ³H and ¹⁴C containing fatty acids at the sn-1 and sn-2 positions, respectively. Therefore, it is prudent to designate the enzyme as a phospholipase A₂/B.

A cDNA encoding the calcium independent cPLA₂/B of the present invention was isolated as described in Example 4. The sequence of the cDNA is reported as SEQ ID NO:1. The amino acid sequence encoded by such cDNA is SEQ ID NO:2. The invention also encompasses allelic variations of the cDNA sequence as set forth in SEQ ID NO:1, that is, naturally-occurring alternative forms of the cDNA of SEQ ID NO: 1 which also encode phospholipase enzymes of the present invention.

Other cDNAs encoding a calcium independent cPLA₂/B of the present invention were isolated from human cDNA sources. Two clones identified as “19a” and “19b” were isolated from a Raij cell DNA library derived from Burkitt's lymphoma (ATCC CCL86, commercially available from Clonetech) using a probe derived from the CHO sequence (a 2.1 kb SalI-SmaI fragment). Clones 19a and 19b were deposited with the American Type Culture Collection on Nov. 7, 1995 as accession numbers ATCC 69948 and ATCC 69949. The nucleotide sequences of clones 19a and 19b are reported in SEQ ID NO:16 and SEQ ID NO:18, respectively. SEQ ID NO:17 and SEQ ID:19 report the corresponding amino acid sequences encoded by the coding regions of clones 19a and 19b, respectively. Clones 19a and 19b are both partial clones of the full-length human enzyme.

SEQ ID NO:20 and SEQ ID NO:22 report the nucleotide sequences of alternative ways in which clones 19a and 19b can be spliced to encode a longer partial clone for the full-length human enzyme. The splice occurs after nucleotide 1225 in SEQ ID NO:20 and after nucleotide 1228 in SEQ ID NO:22. The corresponding spliced amino acid sequences are reported in SEQ ID NO:21 and SEQ ID NO:23. Spliced cDNA clones can be made from clones 19a and 19b in accordance with methods known to those skilled in the art.

Full-length clones encoding the human enzyme can be isolated by probing human cDNA libraries containing full-length clones using probes derived from SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20 or SEQ ID NO:22.

Also included in the invention are isolated DNAs which hybridize to the DNA sequence set forth in SEQ ID NO:1, SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20 or SEQ ID NO:22 under stringent (e.g. 4×SSC at 65° C. or 50% formamide and 4×SSC at 42° C.), or relaxed (4×SSC at 50° C. or 30-40% formamide at 42° C.) conditions.

The isolated polynucleotides of the invention may be operably linked to an expression control sequence such as the pMT2 or pED expression vectors disclosed in Kaufman et al., Nucleic Acids Res. 19, 4485-4490 (1991), in order to produce the phospholipase enzyme peptides recombinantly. Many suitable expression control sequences are known in the art. General methods of expressing recombinant proteins are also known and are exemplified in R. Kaufman, Methods in Enzymology 185, 537-566 (1990). As defined herein “operably linked” means enzymatically or chemically ligated to form a covalent bond between the isolated polynucleotide of the invention and the expression control sequence, in such a way that the phospholipase enzyme peptide is expressed by a host cell which has been transformed (transfected) with the ligated polynucleotide/expression control sequence.

A number of types of cells may act as suitable host cells for expression of the phospholipase enzyme peptide. Suitable host cells are capable of attaching carbohydrate side chains characteristic of functional phospholipase enzyme peptide. Such capability may arise by virtue of the presence of a suitable glycosylating enzyme within the host cell, whether naturally occurring, induced by chemical mutagenesis, or through transfection of the host cell with a suitable expression plasmid containing a polynucleotide encoding the glycosylating enzyme. Host cells include, for example, monkey COS cells, Chinese Hamster Ovary (CHO) cells, human kidney 293 cells, human epidermal A431 cells, human Colo205 cells, 3T3 cells, CV-1 cells, other transformed primate cell lines, normal diploid cells, cell strains derived from in vitro culture of primary tissue, primary explants, HeLa cells, mouse L cells, BHK, HL-60, U937, or HaK cells.

The phospholipase enzyme peptide may also be produced by operably linking the isolated polynucleotide of the invention to suitable control sequences in one or more insect expression vectors, and employing an insect expression system. Materials and methods for baculovirus/insect cell expression systems are commercially available in kit form from, e.g., Invitrogen, San Diego, Calif., U.S.A. (the MaxBac® kit), and such methods are well known in the art, as described in Summers and Smith, Texas Agricultural Experiment Station Bulletin No. 1555 (1987), incorporated herein by reference.

Alternatively, it may be possible to produce the phospholipase enzyme peptide in lower eukaryotes such as yeast or in prokaryotes such as bacteria. Potentially suitable yeast stains include Saccharomyces cerevisiae, Schizosaccharomyces pombe, Kluyveromyces strains, Candida, or any yeast strain capable of expressing heterologous proteins. Potentially suitable bacterial strains include Escherichia coli, Bacillus subtilis, Salmonella typhimurium, or any bacterial strain capable of expressing heterologous proteins. If the phospholipase enzyme peptide is made in yeast or bacteria, it is necessary to attach the appropriate carbohydrates to the appropriate sites on the protein moiety covalently, in order to obtain the glycosylated phospholipase enzyme peptide. Such covalent attachments may be accomplished using known chemical or enzymatic methods.

The phospholipase enzyme peptide of the invention may also be expressed as a product of transgenic animals, e.g., as a component of the milk of transgenic cows, goats, pigs, or sheep which are characterized by somatic or germ cells containing a polynucleotide encoding the phospholipase enzyme peptide.

The phospholipase enzyme peptide of the invention may be prepared by culturing transformed host cells under culture conditions necessary to express a phospholipase enzyme peptide of the present invention. The resulting expressed protein may then be purified from culture medium or cell extracts as described in the examples below.

Alternatively, the phospholipase enzyme peptide of the invention is concentrated using a commercially available protein concentration filter, for example, an Amicon or Millipore Pellicon ultrafiltration unit. Following the concentration step, the concentrate can be applied to a purification matrix such as a gel filtration medium. Alternatively, an anion exchange resin can be employed, for example, a matrix or substrate having pendant diethylaminoethyl (DEAE) groups. The matrices can be acrylamide, agarose, dextran, cellulose or other types commonly employed in protein purification. Alternatively, a cation exchange step can be employed. Suitable cation exchangers include various insoluble matrices comprising sulfopropyl or carboxymethyl groups. Sulfopropyl groups are preferred (e.g., S-Sepharose® columns). The purification of the phospholipase enzyme peptide from culture supernatant may also include one or more column steps over such affinity resins as concanavalin A-agarose, heparin-toyopearl® or Cibacrom blue 3GA Sepharose®; or by hydrophobic interaction chromatography using such resins as phenyl ether, butyl ether, or propyl ether; or by immunoaffinity chromatography.

Finally, one or more reverse-phase high performance liquid chromatography (RP-HPLC) steps employing hydrophobic RP-HPLC media, e.g., silica gel having pendant methyl or other aliphatic groups, can be employed to further purify the phospholipase enzyme peptide. Some or all of the foregoing purification steps, in various combinations, can also be employed to provide a substantially homogeneous isolated recombinant protein. The phospholipase enzyme peptide thus purified is substantially free of other mammalian proteins and is defined in accordance with the present invention as “isolated phospholipase enzyme peptide”.

The calcium independent cPLA₂/B of the present invention is distinct from the cPLA₂ of U.S. Pat. No. 5,322,776 and from previously-described calcium independent phospholipase A₂ enzymes (such as those described by Gross et al., supra; and Ackermann et al., supra). The enzyme of the present invention differs from the cPLA₂ of the '776 patent in the following ways:

(1) its activity is not calcium dependent;

(2) it is more active in 10% glycerol than in 70% glycerol;

(3) it has a molecular weight of 86 kD, not 110 kD as for cPLA₂;

(4) it has a pH optimum of 6, not greater than 8 as for cPLA₂;

(5) it hydrolyzes fatty acids at sn-1 as well as sn-2;

(6) it binds to heparin, while cPLA₂ does not;

(7) it elutes from an anion exchange column at 0.1-0.2 M NaCl, while cPLA₂ elutes at 0.3-0.4 M NaCl; and

(8) it does not bind to anti-cPLA₂ polyclonal antibody.

The enzyme of the present invention differs from the calcium independent enzyme of Gross et al. in the following characteristics:

(1) it has a molecular weight of 86 kD, not 40 kD as for the Gross enzyme;

(2) it is not homologous at the protein level to rabbit skeletal muscle phosphofructokinase in contrast to the 85 kD putative regulatory protein associated with the 40 kD Gross enzyme;

(3) hydrolysis at the sn-2 position is favored by an acyl-linked fatty acid at the sn-1 position in contrast to ether-linked fatty acids with the Gross enzyme;

(4) its does not bind to an ATP column and was not activated by ATP in a liposome assay compared to the Gross enzyme; and

(5) it was active in a mixed micelle assay containing Triton X-100.

The enzyme of the present invention differs from the calcium independent enzyme of Ackermann et al. (the “Dennis enzyme”)in the following characteristics:

(1) it does not bind to an ATP column;

(2) it binds to an anion exchange column (mono Q), while the Dennis enzyme remains in the unbound fraction;

(3) it has a molecular weight of 86 kD, not 74 kD as for the Dennis enzyme;

(4) it has substantial lysophospholipase activity and is relatively inactive on phospholipids containing ether-linked fatty acids at the sn-1 position in a liposome assay; and

(5) it appears to hydrolyze fatty acid substituents at the sn-1 and sn-2 positions of a phospholipid, whereas the Dennis enzyme favors hydrolysis at the sn-2 position.

The calcium independent cPLA₂/B of the present invention may be used to screen unknown compounds having anti-inflammatory activity mediated by the various components of the arachidonic acid cascade. Many assays for phospholipase activity are known and may be used with the calcium independent phospholipase A₂/B on the present invention to screen unknown compounds. For example, such an assay may be a mixed micelle assay as described in Example 3. Other known phospholipase activity assays include, without limitation, those disclosed in U.S. Pat. No. 5,322,776. These assays may be performed manually or may be automated or robotized for faster screening. Methods of automation and robotization are known to those skilled in the art.

In one possible screening assay, a first mixture is formed by combining a phospholipase enzyme peptide of the present invention with a phospholipid cleavable by such peptide, and the amount of hydrolysis in the first mixture (B₀) is measured. A second mixture is also formed by combining the peptide, the phospholipid and the compound or agent to be screened, and the amount of hydrolysis in the second mixture (B) is measured. The amounts of hydrolysis in the first and second mixtures are compared, for example, by performing a B/B₀ calculation. A compound or agent is considered to be capable of inhibiting phospholipase activity (i.e., providing anti-inflammatory activity) if a decrease in hydrolysis in the second mixture as compared to the first mixture is observed. The formulation and optimization of mixtures is within the level of skill in the art, such mixtures may also contain buffers and salts necessary to enhance or to optimize the assay, and additional control assays may be included in the screening assay of the invention.

Other uses for the calcium independent cPLA₂/B of the present invention are in the development of monoclonal and polyclonal antibodies. Such antibodies may be generated by employing purified forms of the calcium independent cPLA₂ or immunogenic fragments thereof as an antigen using standard methods for the development of polyclonal and monoclonal antibodies as are known to those skilled in the art. Such polyclonal or monoclonal antibodies are useful as research or diagnostic tools, and further may be used to study phospholipase A₂ activity and inflammatory conditions.

Pharmaceutical compositions containing anti-inflammatory agents (i.e., inhibitors) identified by the screening method of the present invention may be employed to treat, for example, a number of inflammatory conditions such as rheumatoid arthritis, psoriasis, asthma, inflammatory bowel disease and other diseases mediated by increased levels of prostaglandins, leukotriene, or platelet activating factor. Pharmaceutical compositions of the invention comprise a therapeutically effective amount of a calcium independent cPLA₂ inhibitor compound first identified according to the present invention in a mixture with an optional pharmaceutically acceptable carrier. The term “pharmaceutically acceptable” means a non-toxic material that does not interfere with the effectiveness of the biological activity of the active ingredient(s). The term “therapeutically effective amount” means the total amount of each active component of the method or composition that is sufficient to show a meaningful patient benefit, i.e., healing or amelioration of chronic conditions or increase in rate of healing or amelioration. When applied to an individual active ingredient, administered alone, the term refers to that ingredient alone. When applied to a combination, the term refers to combined amounts of the active ingredients that result in the therapeutic effect, whether administered in combination, serially or simultaneously. A therapeutically effective dose of the inhibitor of this invention is contemplated to be in the range of about 0.1 μg to about 100 mg per kg body weight per application. It is contemplated that the duration of each application of the inhibitor will be in the range of 12 to 24 hours of continuous administration. The characteristics of the carrier or other material will depend on the route of administration.

The amount of inhibitor in the pharmaceutical composition of the present invention will depend upon the nature and severity of the condition being treated, and on the nature of prior treatments which the patient has undergone. Ultimately, the attending physician will decide the amount of inhibitor with which to treat each individual patient. Initially, the attending physician will administer low doses of inhibitor and observe the patient's response. Larger doses of inhibitor may be administered until the optimal therapeutic effect is obtained for the patient, and at that point the dosage is not increased further.

Administration is preferably intravenous, but other known methods of administration for anti-inflammatory agents may be used. Administration of the anti-inflammatory compounds identified by the method of the invention can be carried out in a variety of conventional ways. For example, for topical administration, the anti-inflammatory compound of the invention will be in the form of a pyrogen-free, dermatologically acceptable liquid or semi-solid formulation such as an ointment, cream, lotion, foam or gel. The preparation of such topically applied formulations is within the skill in the art. Gel formulation should contain, in addition to the anti-inflammatory compound, about 2 to about 5% W/W of a gelling agent. The gelling agent may also function to stabilize the active ingredient and preferably should be water soluble. The formulation should also contain about 2% W/V of a bactericidal agent and a buffering agent. Exemplary gels include ethyl, methyl, and propyl celluloses. Preferred gels include carboxypolymethylene such as Carbopol (934P; B. F. Goodrich), hydroxypropyl methylcellulose phthalates such as Methocel (K100M premium; Merril Dow), cellulose gums such as Blanose (7HF; Aqualon, U.K.), xanthan gums such as Keltrol (TF; Kelko International), hydroxyethyl cellulose oxides such as Polyox (WSR 303; Union Carbide), propylene glycols, polyethylene glycols and mixtures thereof. If Carbopol is used, a neutralizing agent, such as NaOH, is also required in order to maintain pH in the desired range of about 7 to about 8 and most desirably at about 7.5. Exemplary preferred bactericidal agents include steryl alcohols, especially benzyl alcohol. The buffering agent can be any of those already known in the art as useful in preparing medicinal formulations, for example 20 mM phosphate buffer, pH 7.5.

Cutaneous or subcutaneous injection may also be employed and in that case the anti-inflammatory compound of the invention will be in the form of pyrogen-free, parenterally acceptable aqueous solutions. The preparation of such parenterally acceptable solutions, having due regard to pH, isotonicity, stability, and the like, is within the skill in the art.

Intravenous injection may be employed, wherein the anti-inflammatory compound of the invention will be in the form of pyrogen-free, parenterally acceptable aqueous solutions. A preferred pharmaceutical composition for intravenous injection should contain, in addition to the anti-inflammatory compound, an isotonic vehicle such as Sodium Chloride Injection, Ringer's Injection, Dextrose Injection, Dextrose and Sodium Chloride Injection, Lactated Ringer's Injection, or other vehicle as known in the art. The pharmaceutical composition according to the present invention may also contain stabilizers, preservatives, buffers, antioxidants, or other additive known to those of skill in the art.

The amount of anti-inflammatory compound in the pharmaceutical composition of the present invention will depend upon the nature and severity of the condition being treated, and on the nature of prior treatments which the patient has undergone. Ultimately, the attending physician will decide the amount of anti-inflammatory compound with which to treat each individual patient.

Anti-inflammatory compounds identified using the method of the present invention may be administered alone or in combination with other anti-inflammation agents and therapies.

EXAMPLE 1 Purification of Calcium Independent cPLA₂

A) Preparation of CHO-Dukx Cytosolic Fraction:

CHO cells, approximately 5×10¹¹ cells from a 250L culture, were concentrated by centrifugation and rinsed once with phosphate-buffered saline and reconcentrated. The cell slurry was frozen in liquid nitrogen and stored at −80° C. at 4×10¹¹ cells/kg of pellet. The CHO pellets were processed in 0.5 kg batches by thawing the cells in 1.2L of 20 mM imidazol pH 7.5, 0.25M sucrose, 2 mM EDTA, 2 mM EGTA, 1 μg/ml leupeptin, 5 μg/ml aprotinin, 5 mM DTT and 1 mM PMSF (“Extraction Buffer”). The cells were transferred to a Parr bomb at 4° C. and pressurized at 600 psi for 5 minutes and lysed by releasing the pressure. The supernatant was centrifuged at 10,000×g for 30 minutes and subsequently at 100,000×g for 60 minutes.

B) DEAE Anion Exchange Chromatography:

The cytosolic fraction (10 gm protein) was diluted to 5 mg/ml with 20 mM imidazol pH 7.5, 5 mM DTT, 1 mM EDTA and 1 mM EGTA (Buffer A) and applied to a 1L column of DEAE toyopearl equilibrated in buffer A at 16 ml/min. The column was washed to background absorbance (A₂₈₀) with buffer A and developed with a gradient of 0-0.5M NaCl in buffer A over 240 minutes with one minute fractions. The first activity peak at 100-150 mM NaCl was collected.

C) Hydrophobic Interaction and Heparin Toyopearl Chromatography:

The DEAE fractions (4 gm of protein at 3 mg/ml) were made 0.5M in ammonium sulfate and applied at 10 ml/min to a 300 ml phenyl toyopearl column equilibrated in buffer A containing 0.5M ammonium sulfate. The column was washed to background absorbance (A₂₈₀). The column was then developed with a gradient of 0.5-0.2M (15 minutes) then 0.2-0.0 M ammonium sulfate (85 minutes). The column was then connected in tandem to a 10 ml heparin column equilibrated in buffer A and elution was continued for 18 hours at 1.5 ml/min with buffer A. The phenyl column was disconnected and the activity was eluted from the heparin column by applying 0.5M NaCl in buffer A at 2 ml/min.

D) Chromatofocussing Chromatography:

A portion of the above active fractions (16 mg) was dialyzed exhaustively against 20 mM Bis-Tris pH 7, 10% glycerol, 1M urea and 5 mM DTT and applied at 0.5 ml/min to a Mono P 5/20 column equilibrated with the same buffer. The column was washed with the same buffer to background absorbance (A₂₈₀) and a pH gradient was established by applying 10% polybuffer 74 pH 5, 10% glycerol, 1M urea and 5 mM DTT.

The relative purification of the enzyme of the present invention at each step of the foregoing purification scheme is summarized in Table II.

TABLE II Fold Protein Activity Specific Activity Purifi- Yield Step (mg) (u**) (u/mg) cation (%) cytosolic 126,000 2050 0.016 — — extract* DEAE 16,000 1264 0.079 5 60 phenyl/ 193 90 0.46 30 4.5 heparin Mono P 0.1-0.2 14 140 8,000 0.7 *Extract from 3.5 kg of frozen CHO cell pellet **1 unit is defined as the amount of activity that releases 1 nmol of arachidonic acid per minute

The phospholipase can be further purified by the following steps:

E) Heparin Chromatography:

The sample from (D) above is applied at 0.5 ml/min onto a heparin column (maximum capacity 10 mg protein/ml of resin), equilibrated in buffer A. The activity is eluted by 0.4M NaCl in buffer A.

F) Size Exclusion Chromatography:

The active fractions from the heparin column are applied to two TSK G3000SW_(XL) columns (7.8 mm×30 cm) linked in tandem equilibrated with 150 mM NaCl in buffer A at 0.3 ml/min. Phospholipase activity elutes in the 250-350 kD size range.

Recombinant enzyme may also be purified in accordance with this example.

EXAMPLE 2 Amino Acid Sequencing

A portion (63 μg total protein) of the Mono P active fractions was concentrated on a heparin column, as described above. The sample, 0.36 ml was mixed with an equal volume of buffer A and 10% SDS, 10 μl and concentrated to 40 μl on an Amicon-30 microconcentrator. The sample was diluted with buffer A, 100 μl, concentrated to 60 μl and diluted with Laemmli buffer (2×), 40 μl. The solution was boiled for 5 minutes and loaded in three aliquots on a 4-20% gradient SDS-PAGE mini gel. The sample was electophoresed for two hours at 120 v, stained for 20 minutes in 0.2% Blue R-250, 20% methanol and 0.5% acetic acid and destained in 30% methanol (Rosenfeld et. al. Anal. Biochem. 203, pp. 173-179, 1992). Briefly, the protein bands corresponding to the phospholipase were excised from the gel with a razor blade and washed with 4 150 μl aliquots of 200 mM NH₄HCO₃, 50% acetonitrile, for a total of 2 hours. The gel pieces were allowed to air dry for approximately 5 minutes, then partially rehydrated with 1 μl of 200 mM NH₄HCO₃, 0.02% Tween 20 (Pierce) and 2 μl of 0.25 μg/μl trypsin (Promega). Gel slices were placed into the bottom of 500 μl mini-Eppendorf tubes, covered with 30 μl 200 mM NH₄HCO₃, and incubated at 37° C. for 15 hours. After 1-2 minutes of centrifugation in an Eppendorf microfuge, the supernatants were removed and saved. Peptides in the gel slices were extracted by agitation for a total of 40 minutes with 2 100 μl aliquots of 60% acetonitrile, 0.1% TFA. The extracts were combined with the previous supernatant. The volume was reduced by lyophilization to about 150 μl, and then the sample was diluted with 750 μl 0.1% TFA. Peptide maps were run on an ABI 130A Separation System HPLC and an ABI 30×2.1 mm RP-300 column. The gradient used was as follows: 0-13.5 minutes 0% B, 13.5-63.5 minutes 0-100% B and 63.5-68.5 minutes 100% B, where A is 0.1% TFA and B is 0.085% TFA, 70% acetonitrile. Peptides were then sequenced on an ABI 470A gas-phase sequencer.

EXAMPLE 3 Phopholipase Assays

1. sn-2 Hydrolysis Assays

A) Liposome: The lipid, e.g. 1-palmitoyl-2-[¹⁴C]arachidonyl-sn-glycero-3-phosphocholine (PAPC), 55 mCi/mmol, was dried under a stream of nitrogen and solubilized in ethanol. The assay buffer contained 100 mM Tris-HCl pH 7, 4 mM EDTA, 4 mM EGTA, 10% glycerol and 25 μM of labelled PAPC, where the volume of ethanol added was no more than 10% of the final assay volume. The reaction was incubated for 30 minutes at 37° C. and quenched by the addition of two volumes of heptane:isopropanol:0.5M sulfuric acid (105:20:1 v/v). Half of the organic was applied to a disposable silica gel column in a vacuum manifold positioned over a scintillation vial, and the free arachidonic was eluted by the addition of ethyl ether (1 ml). The level of radioactivity was measured by liquid scintillation.

Variations on this assay replace EDTA and EGTA with 10 mM CaCl₂.

B) Mixed Micelle Basic: The lipid was dried down as in (A) and to this was added the assay buffer consisting of 80 mM glycine pH 9, 5 mM CaCl₂ or 5 mM EDTA, 10% or 70% glycerol and 200 μM triton X-100. The mixture was then sonicated for 30-60 seconds at 4° C. to form mixed micelles.

C) Mixed Micelle Neutral: As for (B) except 100 mM Tris-HCl pH 7 was used instead of glycine as the buffer.

2. sn-1 Hydrolysis Assays

Sn-1 hydrolysis assays are performed as described above for sn-1 hydrolysis, but using phospholipids labelled at the sn-1 substituent, e.g. 1-[¹⁴C]-palmitoyl-2-arachidonyl-sn-glycero-3-phophocholine.

EXAMPLE 4 Cloning of Calcium Independent cPLA₂/B

A) cDNA Library Construction

Total RNA was first prepared from 2×10⁸ CHO-DUX cells using the RNAgents total RNA kit (Promega, Madison, Wis.) and further purified using the PolyATract mRNA Isolation System (Promega) to yield 13.2 μg polyA+ mRNA. Double stranded cDNA was prepared by the Superscript Choice System (Gibco/BRL, Gaithersburg, Md.) starting with 2 μg of CHO-DUX mRNA and using oligo dT primer. The cDNA was modified at both ends by addition of an EcoRI adapter/linker provided by the kit. These fragments were then ligated into the predigested lambda ZAPII/EcoRI vector, and packaged into phage particles with Gigapack Gold packaging extracts (Stratagene, La Jolla, Calif.).

B) Oligonucleotide Probe Design

Several of the peptide sequences determined for the purified calcium independent PLA₂/B were selected to design oligonucleotide probes. The amino acid sequence from amino acid 361 to 367 of SEQ ID NO:2 was used to design two degenerate oligonucleotide pools of 17 residues each. Pool 1 is 8-fold degenerate representing the sense strand for amino acids 361 to 366 of SEQ ID NO:2, and pool 2 is 12-fold degenerate representing the antisense strand for amino acids 362-367 of SEQ ID NO:2. Two other degenerate pools were also made from other sequences. Pool 3 is 32-fold degenerate and represents the sense strand for amino acids 490 to 495 of SEQ ID NO:2, and pool 4 is 64-fold degenerate representing the antisense strand for amino acids 513 to 518 of SEQ ID NO:2.

C) Library Screening

Approximately 400,000 recombinant bacteriophage from the CHO-DUX cDNA library were plated and duplicate nitrocellulose filters were prepared. One set of filters was hybridized with pool 1 and the other with pool 2 using tetramethylammonium chloride buffer conditions (Jacobs et al., Nature, 1985, 313, 806). Twelve positive bacteriophages were identified and plated for further analysis. Three sets of nitrocellulose filters were prepared from this plating and hybridized with pools 2, 3 and 4, to represent the three peptide sequences from which probes were designed. Several clones were positive for all three pools. Individual bacteriophage plaques were eluted and ampicillin resistant plasmid colonies were prepared following the manufacturer's protocols (Stratagene). Plasmid DNA was prepared for clones 9, 17, 31 and 49, and restriction digests revealed 3.0 kb inserts. Analysis of a portion of the DNA sequence in these clones confirmed that they contained several cPLA₂/B peptide sequences and represented the complete coding region of the gene. Clone 9 was selected for complete DNA sequence determination. The sequence of clone 9 is reported as SEQ ID NO:1.

Clone 9 was deposited with ATCC on Jul. 27, 1994 as accession number 69669.

EXAMPLE 5 Expression of Recombinant cPLA₂/B

A) Expression in COS Cells

Clone 9 from Example 4 was excised inserted into a SalI site that was engineered into the EcoRI site of the COS expression vector, PMT-2, a beta lactamase derivative of p91023 (Wong et al., Science, 1985, 228, 810). 8 μg of plasmid DNA was then transfected into 1×10⁶ COS cells in a 10 cm dish by the DEAE dextran protocol (Sompayrac et al., Proc. Natl. Acad. Sci. USA, 1981, 78, 7575) with the addition of a 0.1 mM chloroquine to the transfection medium, followed by incubation for 3 hours at 37° C. The cells were grown in conventional media (DME, 10% fetal calf serum). At 40-48 hours post-transfection the cells were washed twice and then incubated at 37° C. in PBS, 1 mM EDTA (5 ml). The cells were then collected by centrifugation, resuspended in Extraction Buffer (0.5 ml), and lysed by 20 strokes in a Dounce at 4° C. The lysate was clarified by centrifugation and 10-50 μl of the cytosolic fraction was assayed in the neutral and pH 9 mixed micelle assays.

In a further experiment, COS cells were transiently transfected according to established procedures (Kaufman et al.). After 40-48 hours post-transfection the cells wer labelled with ³⁵S-methionine, 200 μCi per 10 cm plate, for one hour and the cells were lysed in NP-40 lysis buffer (Kaufman et al.). The cell lysates were analyzed by SDS-PAGE on a 4-20% reducing gel where equal counts were loaded per lane. There was an additional protein band at 84-86 kD in the lysates from cells transfected with clones 9, 31 and 49, but not in controls (see FIG. 7).

B) Expression in CHO Cells

A single plasmid bearing both the cPLA₂/B encoding sequence and a DHFR gene, or two separate plasmids bearing such sequences, are introduced into DHFR-deficient CHO cells (such as Dukx-BII) by calcium phosphate coprecipitation and transfection. DHFR expressing transformants are selected for growth in alpha media with dialyzed fetal calf serum. Transformants are checked for expression of recombinant enzyme by bioassay, immunoassay or RNA blotting and positive pools are subsequently selected for amplification by growth in increasing concentrations of methotrexate (MTX) (sequential steps in 0.02, 0.2, 1.0 and 5 μM MTX) as described in Kaufman et al., Mol. Cell Biol., 1983, 5, 1750. The amplified lines are cloned and recombinant enzyme expression is monitored by the mixed micelle assay. Recombinant enzyme expression is expected to increase with increasing levels of MTX resistance.

EXAMPLE 6 Mutagenesis of Serine Residues

Ser252 and Ser465 of the murine cPLA₂/B amino acid sequence were mutated to alanine residues using the Chamelon Mutagenesis kit (Stratagene) using oligonucleotides CATGGGACCCGCTGGCTTTCC (SEQ ID NO:24) and GGCAGGAACCGCCACTGGGGGC (SEQ ID NO:25), respectively. PLA₂ activity was abrogated by changing Ser465 to Ala in the lipase consensus sequence (GXSXGG) surrounding that residue. Although Ser252 is found in a partial lipase motif, mutagenesis did not result in loss of activity. Moreover, Ser465, and the lipase consensus sequence surrounding this residue, are conserved in the human sequence (see amino acids 462-467 of SEQ ID NO:21 and 463-468 of SEQ ID NO:23), while Ser252 is not. On this basis, it is believed that this conserved serine residue is required for activity.

Patent and literature references cited herein are incorporated by reference as if fully set forth.

SEQUENCE LISTING (1) GENERAL INFORMATION: (iii) NUMBER OF SEQUENCES: 25 (2) INFORMATION FOR SEQ ID NO: 1: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2935 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: double (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (iii) ANTI-SENSE: NO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 96..2352 (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 1: GCGGCCGCGT CGACGAAGTA AGCGGGCGGA GAAGTGCTGA GTAAGCCGAG AGTAAGGGGG 60 CAGGCTGTCC CCCCCCCCCA CCTGCCCCAC GGAGG ATG CAG TTC TTC GGA CGC 113 Met Gln Phe Phe Gly Arg 1 5 CTT GTC AAC ACC CTC AGT AGT GTC ACC AAC TTG TTC TCA AAC CCA TTC 161 Leu Val Asn Thr Leu Ser Ser Val Thr Asn Leu Phe Ser Asn Pro Phe 10 15 20 CGG GTG AAG GAG ATA TCT GTG GCT GAC TAT ACC TCA CAT GAA CGT GTT 209 Arg Val Lys Glu Ile Ser Val Ala Asp Tyr Thr Ser His Glu Arg Val 25 30 35 CGA GAG GAA GGG CAG CTG ATC CTG TTC CAG AAT GCT TCC AAT CGC ACC 257 Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln Asn Ala Ser Asn Arg Thr 40 45 50 TGG GAC TGC ATC CTG GTC AGC CCT AGG AAC CCA CAT AGT GGC TTC CGA 305 Trp Asp Cys Ile Leu Val Ser Pro Arg Asn Pro His Ser Gly Phe Arg 55 60 65 70 CTC TTC CAG CTG GAG TCA GAG GCA GAT GCC CTG GTG AAC TTC CAG CAG 353 Leu Phe Gln Leu Glu Ser Glu Ala Asp Ala Leu Val Asn Phe Gln Gln 75 80 85 TTC TCC TCC CAG CTG CCA CCC TTC TAC GAG AGC TCT GTG CAG GTC CTG 401 Phe Ser Ser Gln Leu Pro Pro Phe Tyr Glu Ser Ser Val Gln Val Leu 90 95 100 CAT GTG GAG GTG CTG CAG CAC CTG TCT GAC CTG ATC CGA AGC CAC CCC 449 His Val Glu Val Leu Gln His Leu Ser Asp Leu Ile Arg Ser His Pro 105 110 115 AGC TGG ACG GTG ACA CAC CTG GCG GTG GAG CTT GGC ATT CGG GAG TGC 497 Ser Trp Thr Val Thr His Leu Ala Val Glu Leu Gly Ile Arg Glu Cys 120 125 130 TTC CAC CAC AGC CGC ATC ATC AGC TGC GCC AAC AGC ACA GAG AAT GAG 545 Phe His His Ser Arg Ile Ile Ser Cys Ala Asn Ser Thr Glu Asn Glu 135 140 145 150 GAG GGC TGC ACC CCA CTG CAT TTG GCA TGC CGC AAG GGT GAC AGT GAG 593 Glu Gly Cys Thr Pro Leu His Leu Ala Cys Arg Lys Gly Asp Ser Glu 155 160 165 ATC CTG GTG GAG TTG GTA CAG TAC TGC CAT GCC CAA ATG GAT GTC ACT 641 Ile Leu Val Glu Leu Val Gln Tyr Cys His Ala Gln Met Asp Val Thr 170 175 180 GAC AAC AAA GGA GAG ACG GCC TTC CAT TAC GCT GTA CAA GGG GAC AAT 689 Asp Asn Lys Gly Glu Thr Ala Phe His Tyr Ala Val Gln Gly Asp Asn 185 190 195 TCC CAG GTG CTG CAG CTC CTA GGA AAG AAC GCC TCA GCT GGC CTG AAC 737 Ser Gln Val Leu Gln Leu Leu Gly Lys Asn Ala Ser Ala Gly Leu Asn 200 205 210 CAG GTG AAC AAA CAA GGG CTA ACT CCA CTG CAC CTG GCC TGC CAG ATG 785 Gln Val Asn Lys Gln Gly Leu Thr Pro Leu His Leu Ala Cys Gln Met 215 220 225 230 GGG AAG CAG GAG ATG GTA CGC GTC CTG CTG CTT TGC AAT GCC CGC TGC 833 Gly Lys Gln Glu Met Val Arg Val Leu Leu Leu Cys Asn Ala Arg Cys 235 240 245 AAC GTC ATG GGA CCC AGT GGC TTT CCC ATC CAC ACA GCC ATG AAG TTC 881 Asn Val Met Gly Pro Ser Gly Phe Pro Ile His Thr Ala Met Lys Phe 250 255 260 TCC CAG AAG GGG TGT GCT GAA ATG ATT ATC AGC ATG GAC AGC AGC CAG 929 Ser Gln Lys Gly Cys Ala Glu Met Ile Ile Ser Met Asp Ser Ser Gln 265 270 275 ATC CAC AGC AAG GAT CCT CGC TAT GGA GCC AGC CCG CTC CAC TGG GCC 977 Ile His Ser Lys Asp Pro Arg Tyr Gly Ala Ser Pro Leu His Trp Ala 280 285 290 AAG AAT GCC GAG ATG GCC CGG ATG CTG CTG AAG CGG GGA TGT GAT GTG 1025 Lys Asn Ala Glu Met Ala Arg Met Leu Leu Lys Arg Gly Cys Asp Val 295 300 305 310 GAC AGC ACA AGC GCT GCG GGG AAC ACA GCC CTG CAT GTG GCA GTG ATG 1073 Asp Ser Thr Ser Ala Ala Gly Asn Thr Ala Leu His Val Ala Val Met 315 320 325 CGG AAC CGC TTT GAC TGC GTC ATG GTG CTG CTG ACC TAC GGG GCC AAC 1121 Arg Asn Arg Phe Asp Cys Val Met Val Leu Leu Thr Tyr Gly Ala Asn 330 335 340 GCA GGC ACC CCA GGG GAG CAT GGG AAC ACG CCG CTG CAC CTG GCC ATC 1169 Ala Gly Thr Pro Gly Glu His Gly Asn Thr Pro Leu His Leu Ala Ile 345 350 355 TCG AAA GAT AAC ATG GAG ATG ATC AAA GCC CTC ATT GTA TTT GGG GCA 1217 Ser Lys Asp Asn Met Glu Met Ile Lys Ala Leu Ile Val Phe Gly Ala 360 365 370 GAA GTG GAT ACC CCA AAT GAC TTT GGG GAG ACT CCT GCC TTC ATG GCC 1265 Glu Val Asp Thr Pro Asn Asp Phe Gly Glu Thr Pro Ala Phe Met Ala 375 380 385 390 TCC AAG ATC AGC AAA CAG CTT CAG GAC CTC ATG CCC ATC TCC CGA GCC 1313 Ser Lys Ile Ser Lys Gln Leu Gln Asp Leu Met Pro Ile Ser Arg Ala 395 400 405 CGG AAG CCA GCA TTC ATC CTG AGC TCC ATG AGG GAT GAG AAG CGA ATC 1361 Arg Lys Pro Ala Phe Ile Leu Ser Ser Met Arg Asp Glu Lys Arg Ile 410 415 420 CAT GAT CAC CTG CTC TGC CTG GAC GGA GGG GGC GTG AAA GGC CTG GTC 1409 His Asp His Leu Leu Cys Leu Asp Gly Gly Gly Val Lys Gly Leu Val 425 430 435 ATC ATC CAA CTC CTC ATT GCC ATC GAG AAG GCC TCA GGT GTG GCC ACC 1457 Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys Ala Ser Gly Val Ala Thr 440 445 450 AAG GAC CTC TTC GAC TGG GTG GCA GGA ACC AGC ACT GGG GGC ATC CTG 1505 Lys Asp Leu Phe Asp Trp Val Ala Gly Thr Ser Thr Gly Gly Ile Leu 455 460 465 470 GCC CTG GCC ATT CTG CAC AGT AAG TCC ATG GCC TAT ATG CGT GGT GTG 1553 Ala Leu Ala Ile Leu His Ser Lys Ser Met Ala Tyr Met Arg Gly Val 475 480 485 TAC TTC CGT ATG AAA GAT GAG GTG TTT CGG GGC TCA CGG CCC TAT GAG 1601 Tyr Phe Arg Met Lys Asp Glu Val Phe Arg Gly Ser Arg Pro Tyr Glu 490 495 500 TCT GGA CCC CTG GAG GAG TTC CTG AAG CGG GAG TTT GGG GAG CAC ACC 1649 Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg Glu Phe Gly Glu His Thr 505 510 515 AAG ATG ACA GAT GTC AAA AAA CCC AAG GTG ATG CTC ACA GGG ACA CTG 1697 Lys Met Thr Asp Val Lys Lys Pro Lys Val Met Leu Thr Gly Thr Leu 520 525 530 TCT GAC CGG CAG CCA GCA GAG CTC CAC CTG TTC CGC AAT TAC GAT GCT 1745 Ser Asp Arg Gln Pro Ala Glu Leu His Leu Phe Arg Asn Tyr Asp Ala 535 540 545 550 CCA GAG GTC ATT CGG GAA CCT CGC TTC AAC CAA AAC ATT AAC CTG AAG 1793 Pro Glu Val Ile Arg Glu Pro Arg Phe Asn Gln Asn Ile Asn Leu Lys 555 560 565 CCG CCA ACT CAG CCT GCA GAC CAA CTG GTA TGG CGA GCA GCC CGG AGC 1841 Pro Pro Thr Gln Pro Ala Asp Gln Leu Val Trp Arg Ala Ala Arg Ser 570 575 580 AGT GGG GCA GCC CCA ACC TAC TTC CGG CCC AAT GGA CGT TTC CTG GAT 1889 Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro Asn Gly Arg Phe Leu Asp 585 590 595 GGT GGG CTG CTG GCC AAC AAC CCC ACA CTA GAT GCC ATG ACT GAA ATC 1937 Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu Asp Ala Met Thr Glu Ile 600 605 610 CAT GAA TAC AAT CAG GAC ATG ATC CGC AAG GGC CAA GGC AAC AAG GTG 1985 His Glu Tyr Asn Gln Asp Met Ile Arg Lys Gly Gln Gly Asn Lys Val 615 620 625 630 AAG AAA CTC TCC ATA GTC GTC TCT CTG GGG ACA GGA AGG TCC CCT CAA 2033 Lys Lys Leu Ser Ile Val Val Ser Leu Gly Thr Gly Arg Ser Pro Gln 635 640 645 GTG CCC GTA ACC TGT GTA GAT GTC TTC CGC CCC AGC AAC CCC TGG GAA 2081 Val Pro Val Thr Cys Val Asp Val Phe Arg Pro Ser Asn Pro Trp Glu 650 655 660 CTG GCT AAG ACT GTT TTT GGA GCC AAG GAA CTG GGC AAG ATG GTG GTA 2129 Leu Ala Lys Thr Val Phe Gly Ala Lys Glu Leu Gly Lys Met Val Val 665 670 675 GAC TGT TGC ACA GAT CCA GAT GGT CGG GCT GTG GAC CGG GCC CGG GCC 2177 Asp Cys Cys Thr Asp Pro Asp Gly Arg Ala Val Asp Arg Ala Arg Ala 680 685 690 TGG AGC GAG ATG GTT GGC ATC CAG TAC TTC AGA CTG AAC CCC CAA CTA 2225 Trp Ser Glu Met Val Gly Ile Gln Tyr Phe Arg Leu Asn Pro Gln Leu 695 700 705 710 GGA TCA GAC ATC ATG CTG GAT GAG GTC AAT GAT GCA GTG CTG GTT AAT 2273 Gly Ser Asp Ile Met Leu Asp Glu Val Asn Asp Ala Val Leu Val Asn 715 720 725 GCC CTC TGG GAG ACA GAA GTC TAC ATC TAT GAG CAC CGG GAG GAG TTC 2321 Ala Leu Trp Glu Thr Glu Val Tyr Ile Tyr Glu His Arg Glu Glu Phe 730 735 740 CAG AAG CTT GTC CAA ATG CTG CTG TCG CCC T GAGCTCCAGG CCCTGCTGGC 2372 Gln Lys Leu Val Gln Met Leu Leu Ser Pro 745 750 AGGGGTGCGC CAGGCTACCC AGCACACTGG GGGCCAAGCT GGGCCAGGCG GCTGTGTCTA 2432 CCTGAGGACT GGGGCTCAGA GCACAAACAG GTTCCCACAA GGCACCTCTC CTGACCCATC 2492 TGCACTTTGC CACTCTAGGC TGAAAGCCCA GAGTTCCCCT CAGCCCCTTT ATGTGACTGT 2552 GAAGGACAAC TGGCTCCATC AACTGCCCTA AATATCAGTG AGATCAACAC TAAGGTGTCC 2612 AGTGTACCCA GAGGGTTCTT CCAGGGTCCA TGGCCACCAA AGCCCACCCC TTCTTTCCAC 2672 TTCCTGAAGT CAGTGTCTAC AGAAATGGAG TTCCACCCCA TCATCAGGTG AAATCCAGGC 2732 TATTGAAATC CAGTCTGTTC GACTTTGCCC CTCTGCACCT GCCAATCACC CCACCCCTGC 2792 AGCCACCCCA CCTTAAGAGT CCTCCCAGCT CTCAAAGGTC AATCCTGTGC ATGTACTCTT 2852 CTCTGGAAGG AGAGTGGGGA GGGGTTCAAG GCCACCTCAA CTGTGAAATA AATGGGTCTA 2912 GACTCAAAAA AAAAAAGTCG ACG 2935 (2) INFORMATION FOR SEQ ID NO: 2: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 752 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 2: Met Gln Phe Phe Gly Arg Leu Val Asn Thr Leu Ser Ser Val Thr Asn 1 5 10 15 Leu Phe Ser Asn Pro Phe Arg Val Lys Glu Ile Ser Val Ala Asp Tyr 20 25 30 Thr Ser His Glu Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln 35 40 45 Asn Ala Ser Asn Arg Thr Trp Asp Cys Ile Leu Val Ser Pro Arg Asn 50 55 60 Pro His Ser Gly Phe Arg Leu Phe Gln Leu Glu Ser Glu Ala Asp Ala 65 70 75 80 Leu Val Asn Phe Gln Gln Phe Ser Ser Gln Leu Pro Pro Phe Tyr Glu 85 90 95 Ser Ser Val Gln Val Leu His Val Glu Val Leu Gln His Leu Ser Asp 100 105 110 Leu Ile Arg Ser His Pro Ser Trp Thr Val Thr His Leu Ala Val Glu 115 120 125 Leu Gly Ile Arg Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala 130 135 140 Asn Ser Thr Glu Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys 145 150 155 160 Arg Lys Gly Asp Ser Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His 165 170 175 Ala Gln Met Asp Val Thr Asp Asn Lys Gly Glu Thr Ala Phe His Tyr 180 185 190 Ala Val Gln Gly Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Lys Asn 195 200 205 Ala Ser Ala Gly Leu Asn Gln Val Asn Lys Gln Gly Leu Thr Pro Leu 210 215 220 His Leu Ala Cys Gln Met Gly Lys Gln Glu Met Val Arg Val Leu Leu 225 230 235 240 Leu Cys Asn Ala Arg Cys Asn Val Met Gly Pro Ser Gly Phe Pro Ile 245 250 255 His Thr Ala Met Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile 260 265 270 Ser Met Asp Ser Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala 275 280 285 Ser Pro Leu His Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu 290 295 300 Lys Arg Gly Cys Asp Val Asp Ser Thr Ser Ala Ala Gly Asn Thr Ala 305 310 315 320 Leu His Val Ala Val Met Arg Asn Arg Phe Asp Cys Val Met Val Leu 325 330 335 Leu Thr Tyr Gly Ala Asn Ala Gly Thr Pro Gly Glu His Gly Asn Thr 340 345 350 Pro Leu His Leu Ala Ile Ser Lys Asp Asn Met Glu Met Ile Lys Ala 355 360 365 Leu Ile Val Phe Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu 370 375 380 Thr Pro Ala Phe Met Ala Ser Lys Ile Ser Lys Gln Leu Gln Asp Leu 385 390 395 400 Met Pro Ile Ser Arg Ala Arg Lys Pro Ala Phe Ile Leu Ser Ser Met 405 410 415 Arg Asp Glu Lys Arg Ile His Asp His Leu Leu Cys Leu Asp Gly Gly 420 425 430 Gly Val Lys Gly Leu Val Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys 435 440 445 Ala Ser Gly Val Ala Thr Lys Asp Leu Phe Asp Trp Val Ala Gly Thr 450 455 460 Ser Thr Gly Gly Ile Leu Ala Leu Ala Ile Leu His Ser Lys Ser Met 465 470 475 480 Ala Tyr Met Arg Gly Val Tyr Phe Arg Met Lys Asp Glu Val Phe Arg 485 490 495 Gly Ser Arg Pro Tyr Glu Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg 500 505 510 Glu Phe Gly Glu His Thr Lys Met Thr Asp Val Lys Lys Pro Lys Val 515 520 525 Met Leu Thr Gly Thr Leu Ser Asp Arg Gln Pro Ala Glu Leu His Leu 530 535 540 Phe Arg Asn Tyr Asp Ala Pro Glu Val Ile Arg Glu Pro Arg Phe Asn 545 550 555 560 Gln Asn Ile Asn Leu Lys Pro Pro Thr Gln Pro Ala Asp Gln Leu Val 565 570 575 Trp Arg Ala Ala Arg Ser Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro 580 585 590 Asn Gly Arg Phe Leu Asp Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu 595 600 605 Asp Ala Met Thr Glu Ile His Glu Tyr Asn Gln Asp Met Ile Arg Lys 610 615 620 Gly Gln Gly Asn Lys Val Lys Lys Leu Ser Ile Val Val Ser Leu Gly 625 630 635 640 Thr Gly Arg Ser Pro Gln Val Pro Val Thr Cys Val Asp Val Phe Arg 645 650 655 Pro Ser Asn Pro Trp Glu Leu Ala Lys Thr Val Phe Gly Ala Lys Glu 660 665 670 Leu Gly Lys Met Val Val Asp Cys Cys Thr Asp Pro Asp Gly Arg Ala 675 680 685 Val Asp Arg Ala Arg Ala Trp Ser Glu Met Val Gly Ile Gln Tyr Phe 690 695 700 Arg Leu Asn Pro Gln Leu Gly Ser Asp Ile Met Leu Asp Glu Val Asn 705 710 715 720 Asp Ala Val Leu Val Asn Ala Leu Trp Glu Thr Glu Val Tyr Ile Tyr 725 730 735 Glu His Arg Glu Glu Phe Gln Lys Leu Val Gln Met Leu Leu Ser Pro 740 745 750 (2) INFORMATION FOR SEQ ID NO:3: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:3: Asn Pro His Ser Gly Phe Arg 1 5 (2) INFORMATION FOR SEQ ID NO:4: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:4: Xaa Ala Ser Xaa Gly Leu Asn Gln Val Asn Lys 1 5 10 (2) INFORMATION FOR SEQ ID NO:5: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:5: Tyr Gly Ala Ser Pro Leu His Xaa Ala Lys 1 5 10 (2) INFORMATION FOR SEQ ID NO:6: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:6: Asp Asn Met Glu Met Ile Lys 1 5 (2) INFORMATION FOR SEQ ID NO:7: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:7: Gly Val Tyr Phe Arg 1 5 (2) INFORMATION FOR SEQ ID NO:8: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:8: Met Lys Asp Glu Val Phe Arg 1 5 (2) INFORMATION FOR SEQ ID NO:9: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 7 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:9: Glu Phe Gly Glu His Thr Lys 1 5 (2) INFORMATION FOR SEQ ID NO:10: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:10: Val Met Leu Thr Gly Thr Leu Ser Asp Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO:11: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 9 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:11: Xaa Tyr Asp Ala Pro Glu Val Ile Arg 1 5 (2) INFORMATION FOR SEQ ID NO:12: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:12: Phe Asn Gln Asn Ile Asn Leu Lys Pro Pro Thr Gln Pro Ala 1 5 10 (2) INFORMATION FOR SEQ ID NO:13: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:13: Xaa Xaa Gly Ala Ala Pro Thr Tyr Phe Arg Pro 1 5 10 (2) INFORMATION FOR SEQ ID NO:14: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:14: Thr Val Phe Gly Ala Lys 1 5 (2) INFORMATION FOR SEQ ID NO:15: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 12 amino acids (B) TYPE: amino acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:15: Xaa Trp Ser Glu Met Val Gly Ile Gln Tyr Phe Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO:16: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2012 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: double (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 43..1224 (xi) SEQUENCE DESCRIPTION: SEQ ID NO:16: GAATTCCGGG ACGGTGGGGC CTCCCCACCT GCCCCGCAGA AG ATG CAG TTC TTT 54 Met Gln Phe Phe 1 GGC CGC CTG GTC AAT ACC TTC AGT GGC GTC ACC AAC TTG TTC TCT AAC 102 Gly Arg Leu Val Asn Thr Phe Ser Gly Val Thr Asn Leu Phe Ser Asn 5 10 15 20 CCA TTC CGG GTG AAG GAG GTG GCT GTG GCC GAC TAC ACC TCG AGT GAC 150 Pro Phe Arg Val Lys Glu Val Ala Val Ala Asp Tyr Thr Ser Ser Asp 25 30 35 CGA GTT CGG GAG GAA GGG CAG CTG ATT CTG TTC CAG AAC ACT CCC AAC 198 Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln Asn Thr Pro Asn 40 45 50 CGC ACC TGG GAC TGC GTC CTG GTC AAC CCC AGG AAC TCA CAG AGT GGA 246 Arg Thr Trp Asp Cys Val Leu Val Asn Pro Arg Asn Ser Gln Ser Gly 55 60 65 TTC CGA CTC TTC CAG CTG GAG TTG GAG GCT GAC GCC CTA GTG AAT TTC 294 Phe Arg Leu Phe Gln Leu Glu Leu Glu Ala Asp Ala Leu Val Asn Phe 70 75 80 CAT CAG TAT TCT TCC CAG CTG CTA CCC TTC TAT GAG AGC TCC CCT CAG 342 His Gln Tyr Ser Ser Gln Leu Leu Pro Phe Tyr Glu Ser Ser Pro Gln 85 90 95 100 GTC CTG CAC ACT GAG GTC CTG CAG CAC CTG ACC GAC CTC ATC CGT AAC 390 Val Leu His Thr Glu Val Leu Gln His Leu Thr Asp Leu Ile Arg Asn 105 110 115 CAC CCC AGC TGG TCA GTG GCC CAC CTG GCT GTG GAG CTA GGG ATC CGC 438 His Pro Ser Trp Ser Val Ala His Leu Ala Val Glu Leu Gly Ile Arg 120 125 130 GAG TGC TTC CAT CAC AGC CGT ATC ATC AGC TGT GCC AAT TGC GCG GAG 486 Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala Asn Cys Ala Glu 135 140 145 AAC GAG GAG GGC TGC ACA CCC CTG CAC CTG GCC TGC CGC AAG GGT GAT 534 Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys Arg Lys Gly Asp 150 155 160 GGG GAG ATC CTG GTG GAG CTG GTG CAG TAC TGC CAC ACT CAG ATG GAT 582 Gly Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His Thr Gln Met Asp 165 170 175 180 GTC ACC GAC TAC AAG GGA GAG ACC GTC TTC CAT TAT GCT GTC CAG GGT 630 Val Thr Asp Tyr Lys Gly Glu Thr Val Phe His Tyr Ala Val Gln Gly 185 190 195 GAC AAT TCT CAG GTG CTG CAG CTC CTT GGA AGG AAC GCA GTG GCT GGC 678 Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Arg Asn Ala Val Ala Gly 200 205 210 CTG AAC CAG GTG AAT AAC CAA GGG CTG ACC CCG CTG CAC CTG GCC TGC 726 Leu Asn Gln Val Asn Asn Gln Gly Leu Thr Pro Leu His Leu Ala Cys 215 220 225 CAG CTG GGG AAG CAG GAG ATG GTC CGC GTG CTG CTG CTG TGC AAT GCT 774 Gln Leu Gly Lys Gln Glu Met Val Arg Val Leu Leu Leu Cys Asn Ala 230 235 240 CGG TGC AAC ATC ATG GGC CCC AAC GGC TAC CCC ATC CAC TCG GCC ATG 822 Arg Cys Asn Ile Met Gly Pro Asn Gly Tyr Pro Ile His Ser Ala Met 245 250 255 260 AAG TTC TCT CAG AAG GGG TGT GCG GAG ATG ATC ATC AGC ATG GAC AGC 870 Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile Ser Met Asp Ser 265 270 275 AGC CAG ATC CAC AGC AAA GAC CCC CGT TAC GGA GCC AGC CCC CTC CAC 918 Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala Ser Pro Leu His 280 285 290 TGG GCC AAG AAC GCA GAG ATG GCC CGC ATG CTG CTG AAA CGG GGC TGC 966 Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu Lys Arg Gly Cys 295 300 305 AAC GTG AAC AGC ACC AGC TCC GCG GGG AAC ACG GCC CTG CAC GTG GGG 1014 Asn Val Asn Ser Thr Ser Ser Ala Gly Asn Thr Ala Leu His Val Gly 310 315 320 GTG ATG CGC AAC CGC TTC GAC TGT GCC ATA GTG CTG CTG ACC CAC GGG 1062 Val Met Arg Asn Arg Phe Asp Cys Ala Ile Val Leu Leu Thr His Gly 325 330 335 340 GCC AAC GCG GAT GCC CGC GGA GAG CAC GGC AAC ACC CCG CTG CAC CTG 1110 Ala Asn Ala Asp Ala Arg Gly Glu His Gly Asn Thr Pro Leu His Leu 345 350 355 GCC ATG TCG AAA GAC AAC GTG GAG ATG ATC AAG GCC CTC ATC GTG TTC 1158 Ala Met Ser Lys Asp Asn Val Glu Met Ile Lys Ala Leu Ile Val Phe 360 365 370 GGA GCA GAA GTG GAC ACC CCG AAT GAC TTT GGG GAG ACT CCT ACA TTC 1206 Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu Thr Pro Thr Phe 375 380 385 CTA GCC TCC AAA ATC GGC AGACTTGTCA CCAGGAAGGC GATCTTGACT 1254 Leu Ala Ser Lys Ile Gly 390 CTGCTGAGAA CCGTGGGGGC CGAATACTGC TTCCCACCCA TCCACGGGGT CCCCGCGGAG 1314 CAGGGCTCTG CAGCGCCACA TCATCCCTTC TCCCTGGAAA GAGCTCAGCC CCCACCGATC 1374 AGCCTAAACA ACCTAGGCAG TCACCCAAGC CAGGCCGGAT GGTGGGCCTG GGGTGCGGCG 1434 TCAGATGGGT AACGCCCTGG GCCTGGAGAG GCCACCGAGC CTAGCCATGC GGCATTAGCT 1494 CTAGCTCTCA CTCCCTAATC CGTCCTTCTT AGCTGCGCAC ACACCACACG CCCCCTCCCC 1554 TGCACCCTGT CCCCGGCCTC TCTCAGCCAC TCTTCTGCTT CCCTTGTTCA CTGTGCAGCC 1614 GTGTGCCCTG GGGAGGGGGA GACACCGCTT CGCAGCCCTC GGTTCTGCTT TGCTGCTTCT 1674 AGACTCTGCA CAGTGGTGGG GGGCTGTCAG AGTTGGGGTC ACGCGGGCTG CTGCACCAGG 1734 CACCTGGGGA CTGGGCTGCT TGTCAGGAGG GGCAGCTAGT CAGTTGGGTG GACGTCGGGC 1794 AGGCCTTGGA CACAAAGGAA GACATGGACA GAGTGGATGG TGGGCCTGAT CCCGGAGGCC 1854 ACTGGGATTT CCAGACCTGG GATCAGGACG AGGGATGTCT CCTTTCATCC ATGGACTTAA 1914 ACCCCGAGGA ACGTCCTGAC TCAGCCTTTT GACTAAATGA CCTTGGGTGA ATTATGGACC 1974 CTCTTAGAGC CTCACCTGTC AATAGGGAAT AAGAATTC 2012 (2) INFORMATION FOR SEQ ID NO:17: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 394 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:17: Met Gln Phe Phe Gly Arg Leu Val Asn Thr Phe Ser Gly Val Thr Asn 1 5 10 15 Leu Phe Ser Asn Pro Phe Arg Val Lys Glu Val Ala Val Ala Asp Tyr 20 25 30 Thr Ser Ser Asp Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln 35 40 45 Asn Thr Pro Asn Arg Thr Trp Asp Cys Val Leu Val Asn Pro Arg Asn 50 55 60 Ser Gln Ser Gly Phe Arg Leu Phe Gln Leu Glu Leu Glu Ala Asp Ala 65 70 75 80 Leu Val Asn Phe His Gln Tyr Ser Ser Gln Leu Leu Pro Phe Tyr Glu 85 90 95 Ser Ser Pro Gln Val Leu His Thr Glu Val Leu Gln His Leu Thr Asp 100 105 110 Leu Ile Arg Asn His Pro Ser Trp Ser Val Ala His Leu Ala Val Glu 115 120 125 Leu Gly Ile Arg Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala 130 135 140 Asn Cys Ala Glu Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys 145 150 155 160 Arg Lys Gly Asp Gly Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His 165 170 175 Thr Gln Met Asp Val Thr Asp Tyr Lys Gly Glu Thr Val Phe His Tyr 180 185 190 Ala Val Gln Gly Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Arg Asn 195 200 205 Ala Val Ala Gly Leu Asn Gln Val Asn Asn Gln Gly Leu Thr Pro Leu 210 215 220 His Leu Ala Cys Gln Leu Gly Lys Gln Glu Met Val Arg Val Leu Leu 225 230 235 240 Leu Cys Asn Ala Arg Cys Asn Ile Met Gly Pro Asn Gly Tyr Pro Ile 245 250 255 His Ser Ala Met Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile 260 265 270 Ser Met Asp Ser Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala 275 280 285 Ser Pro Leu His Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu 290 295 300 Lys Arg Gly Cys Asn Val Asn Ser Thr Ser Ser Ala Gly Asn Thr Ala 305 310 315 320 Leu His Val Gly Val Met Arg Asn Arg Phe Asp Cys Ala Ile Val Leu 325 330 335 Leu Thr His Gly Ala Asn Ala Asp Ala Arg Gly Glu His Gly Asn Thr 340 345 350 Pro Leu His Leu Ala Met Ser Lys Asp Asn Val Glu Met Ile Lys Ala 355 360 365 Leu Ile Val Phe Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu 370 375 380 Thr Pro Thr Phe Leu Ala Ser Lys Ile Gly 385 390 (2) INFORMATION FOR SEQ ID NO:18: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 1277 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: double (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 396..1271 (xi) SEQUENCE DESCRIPTION: SEQ ID NO:18: GAATTCTTAG GCCCCAGGTG GTTATTGCAG CATCGGCTCC GATGCAAGAA GAAGCACTTT 60 GTCTGAAGAG GACACGCAAG GGTATTCATG CCTTGGGGTT TCAAGAGGAA GAGATTGAGG 120 GGAACCTGGG AGCTGGCTGG GCAGGGTGGG GAGCCCTTCC CAGAGCAGTG GGCCCCCCTT 180 TCCACTCCAG CCCATTTCTC TCCTGTGGCC TGTGGCTCAG CTTTCTCCTG GGACAGAGTC 240 CTTCCTGTGG GGAAGGGACA GATGACAGGG GGAGTGGGGG GATGAGGGCG TGGCCGTGGG 300 CGAGGCACAG CCCAGGTTTG ATCTAGGGAC CTCTGGGGTA GCAGGGCTTG GGGACCCACC 360 TGACCACAGC ATGCCCTGCT CTGTGCCTCA CAGAA CTA CAG GAT CTC ATG CAC 413 Leu Gln Asp Leu Met His 1 5 ATC TCA CGG GCC CGG AAG CCA GCG TTC ATC CTG GGC TCC ATG AGG GAC 461 Ile Ser Arg Ala Arg Lys Pro Ala Phe Ile Leu Gly Ser Met Arg Asp 10 15 20 GAG AAG CGG ACC CAC GAC CAC CTG CTG TGC CTG GAT GGA GGA GGA GTG 509 Glu Lys Arg Thr His Asp His Leu Leu Cys Leu Asp Gly Gly Gly Val 25 30 35 AAA GGC CTC ATC ATC ATC CAG CTC CTC ATC GCC ATC GAG AAG GCC TCG 557 Lys Gly Leu Ile Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys Ala Ser 40 45 50 GGT GTG GCC ACC AAG GAC CTG TTT GAC TGG GTG GCG GGC ACC AGC ACT 605 Gly Val Ala Thr Lys Asp Leu Phe Asp Trp Val Ala Gly Thr Ser Thr 55 60 65 70 GGA GGC ATC CTG GCC CTG GCC ATT CTG CAC AGT AAG TCC ATG GCC TAC 653 Gly Gly Ile Leu Ala Leu Ala Ile Leu His Ser Lys Ser Met Ala Tyr 75 80 85 ATG CGC GGC ATG TAC TTT CGC ATG AAG GAT GAG GTG TTC CGG GGC TCC 701 Met Arg Gly Met Tyr Phe Arg Met Lys Asp Glu Val Phe Arg Gly Ser 90 95 100 AGG CCC TAC GAG TCG GGG CCC CTG GAG GAG TTC CTG AAG CGG GAG TTT 749 Arg Pro Tyr Glu Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg Glu Phe 105 110 115 GGG GAG CAC ACC AAG ATG ACG GAC GTC AGG AAA CCC AAG GTG ATG CTG 797 Gly Glu His Thr Lys Met Thr Asp Val Arg Lys Pro Lys Val Met Leu 120 125 130 ACA GGG ACA CTG TCT GAC CGG CAG CCG GCT GAA CTC CAC CTC TTC CGG 845 Thr Gly Thr Leu Ser Asp Arg Gln Pro Ala Glu Leu His Leu Phe Arg 135 140 145 150 AAC TAC GAT GCT CCA GAA ACT GTC CGG GAG CCT CGT TTC AAC CAG AAC 893 Asn Tyr Asp Ala Pro Glu Thr Val Arg Glu Pro Arg Phe Asn Gln Asn 155 160 165 GTT AAC CTC AGG CCT CCA GCT CAG CCC TCA GAC CAG CTG GTG TGG CGG 941 Val Asn Leu Arg Pro Pro Ala Gln Pro Ser Asp Gln Leu Val Trp Arg 170 175 180 GCG GCC CGA AGC AGC GGG GCA GCT CCT ACT TAC TTC CGA CCC AAT GGG 989 Ala Ala Arg Ser Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro Asn Gly 185 190 195 CGC TTC CTG GAC GGT GGG CTG TTG GCC AAC AAC CCC ACG CTG GAT GCC 1037 Arg Phe Leu Asp Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu Asp Ala 200 205 210 ATG ACC GAG ATC CAT GAG TAC AAT CAG GAC CTG ATC CGC AAG GGT CAG 1085 Met Thr Glu Ile His Glu Tyr Asn Gln Asp Leu Ile Arg Lys Gly Gln 215 220 225 230 GCC AAC AAG GTG AAG AAA CTC TCC ATC GTT GTC TCC CTG GGG ACA GGG 1133 Ala Asn Lys Val Lys Lys Leu Ser Ile Val Val Ser Leu Gly Thr Gly 235 240 245 AGG TCC CCA CAA GTG CCT GTG ACC TGT GTG GAT GTC TTC CGT CCC AGC 1181 Arg Ser Pro Gln Val Pro Val Thr Cys Val Asp Val Phe Arg Pro Ser 250 255 260 AAC CCC TGG GAG CTG GCC AAG ACT GTT TTT GGG GCC AAG GAA CTG GGC 1229 Asn Pro Trp Glu Leu Ala Lys Thr Val Phe Gly Ala Lys Glu Leu Gly 265 270 275 AAG ATG GTG GTG GAC TGT TGC ACG GAT CCA GAC GGG CGG CCG 1271 Lys Met Val Val Asp Cys Cys Thr Asp Pro Asp Gly Arg Pro 280 285 290 GAATTC 1277 (2) INFORMATION FOR SEQ ID NO:19: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 292 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:19: Leu Gln Asp Leu Met His Ile Ser Arg Ala Arg Lys Pro Ala Phe Ile 1 5 10 15 Leu Gly Ser Met Arg Asp Glu Lys Arg Thr His Asp His Leu Leu Cys 20 25 30 Leu Asp Gly Gly Gly Val Lys Gly Leu Ile Ile Ile Gln Leu Leu Ile 35 40 45 Ala Ile Glu Lys Ala Ser Gly Val Ala Thr Lys Asp Leu Phe Asp Trp 50 55 60 Val Ala Gly Thr Ser Thr Gly Gly Ile Leu Ala Leu Ala Ile Leu His 65 70 75 80 Ser Lys Ser Met Ala Tyr Met Arg Gly Met Tyr Phe Arg Met Lys Asp 85 90 95 Glu Val Phe Arg Gly Ser Arg Pro Tyr Glu Ser Gly Pro Leu Glu Glu 100 105 110 Phe Leu Lys Arg Glu Phe Gly Glu His Thr Lys Met Thr Asp Val Arg 115 120 125 Lys Pro Lys Val Met Leu Thr Gly Thr Leu Ser Asp Arg Gln Pro Ala 130 135 140 Glu Leu His Leu Phe Arg Asn Tyr Asp Ala Pro Glu Thr Val Arg Glu 145 150 155 160 Pro Arg Phe Asn Gln Asn Val Asn Leu Arg Pro Pro Ala Gln Pro Ser 165 170 175 Asp Gln Leu Val Trp Arg Ala Ala Arg Ser Ser Gly Ala Ala Pro Thr 180 185 190 Tyr Phe Arg Pro Asn Gly Arg Phe Leu Asp Gly Gly Leu Leu Ala Asn 195 200 205 Asn Pro Thr Leu Asp Ala Met Thr Glu Ile His Glu Tyr Asn Gln Asp 210 215 220 Leu Ile Arg Lys Gly Gln Ala Asn Lys Val Lys Lys Leu Ser Ile Val 225 230 235 240 Val Ser Leu Gly Thr Gly Arg Ser Pro Gln Val Pro Val Thr Cys Val 245 250 255 Asp Val Phe Arg Pro Ser Asn Pro Trp Glu Leu Ala Lys Thr Val Phe 260 265 270 Gly Ala Lys Glu Leu Gly Lys Met Val Val Asp Cys Cys Thr Asp Pro 275 280 285 Asp Gly Arg Pro 290 (2) INFORMATION FOR SEQ ID NO:20: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2109 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: double (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 43..2103 (xi) SEQUENCE DESCRIPTION: SEQ ID NO:20: GAATTCCGGG ACGGTGGGGC CTCCCCACCT GCCCCGCAGA AG ATG CAG TTC TTT 54 Met Gln Phe Phe 1 GGC CGC CTG GTC AAT ACC TTC AGT GGC GTC ACC AAC TTG TTC TCT AAC 102 Gly Arg Leu Val Asn Thr Phe Ser Gly Val Thr Asn Leu Phe Ser Asn 5 10 15 20 CCA TTC CGG GTG AAG GAG GTG GCT GTG GCC GAC TAC ACC TCG AGT GAC 150 Pro Phe Arg Val Lys Glu Val Ala Val Ala Asp Tyr Thr Ser Ser Asp 25 30 35 CGA GTT CGG GAG GAA GGG CAG CTG ATT CTG TTC CAG AAC ACT CCC AAC 198 Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln Asn Thr Pro Asn 40 45 50 CGC ACC TGG GAC TGC GTC CTG GTC AAC CCC AGG AAC TCA CAG AGT GGA 246 Arg Thr Trp Asp Cys Val Leu Val Asn Pro Arg Asn Ser Gln Ser Gly 55 60 65 TTC CGA CTC TTC CAG CTG GAG TTG GAG GCT GAC GCC CTA GTG AAT TTC 294 Phe Arg Leu Phe Gln Leu Glu Leu Glu Ala Asp Ala Leu Val Asn Phe 70 75 80 CAT CAG TAT TCT TCC CAG CTG CTA CCC TTC TAT GAG AGC TCC CCT CAG 342 His Gln Tyr Ser Ser Gln Leu Leu Pro Phe Tyr Glu Ser Ser Pro Gln 85 90 95 100 GTC CTG CAC ACT GAG GTC CTG CAG CAC CTG ACC GAC CTC ATC CGT AAC 390 Val Leu His Thr Glu Val Leu Gln His Leu Thr Asp Leu Ile Arg Asn 105 110 115 CAC CCC AGC TGG TCA GTG GCC CAC CTG GCT GTG GAG CTA GGG ATC CGC 438 His Pro Ser Trp Ser Val Ala His Leu Ala Val Glu Leu Gly Ile Arg 120 125 130 GAG TGC TTC CAT CAC AGC CGT ATC ATC AGC TGT GCC AAT TGC GCG GAG 486 Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala Asn Cys Ala Glu 135 140 145 AAC GAG GAG GGC TGC ACA CCC CTG CAC CTG GCC TGC CGC AAG GGT GAT 534 Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys Arg Lys Gly Asp 150 155 160 GGG GAG ATC CTG GTG GAG CTG GTG CAG TAC TGC CAC ACT CAG ATG GAT 582 Gly Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His Thr Gln Met Asp 165 170 175 180 GTC ACC GAC TAC AAG GGA GAG ACC GTC TTC CAT TAT GCT GTC CAG GGT 630 Val Thr Asp Tyr Lys Gly Glu Thr Val Phe His Tyr Ala Val Gln Gly 185 190 195 GAC AAT TCT CAG GTG CTG CAG CTC CTT GGA AGG AAC GCA GTG GCT GGC 678 Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Arg Asn Ala Val Ala Gly 200 205 210 CTG AAC CAG GTG AAT AAC CAA GGG CTG ACC CCG CTG CAC CTG GCC TGC 726 Leu Asn Gln Val Asn Asn Gln Gly Leu Thr Pro Leu His Leu Ala Cys 215 220 225 CAG CTG GGG AAG CAG GAG ATG GTC CGC GTG CTG CTG CTG TGC AAT GCT 774 Gln Leu Gly Lys Gln Glu Met Val Arg Val Leu Leu Leu Cys Asn Ala 230 235 240 CGG TGC AAC ATC ATG GGC CCC AAC GGC TAC CCC ATC CAC TCG GCC ATG 822 Arg Cys Asn Ile Met Gly Pro Asn Gly Tyr Pro Ile His Ser Ala Met 245 250 255 260 AAG TTC TCT CAG AAG GGG TGT GCG GAG ATG ATC ATC AGC ATG GAC AGC 870 Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile Ser Met Asp Ser 265 270 275 AGC CAG ATC CAC AGC AAA GAC CCC CGT TAC GGA GCC AGC CCC CTC CAC 918 Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala Ser Pro Leu His 280 285 290 TGG GCC AAG AAC GCA GAG ATG GCC CGC ATG CTG CTG AAA CGG GGC TGC 966 Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu Lys Arg Gly Cys 295 300 305 AAC GTG AAC AGC ACC AGC TCC GCG GGG AAC ACG GCC CTG CAC GTG GGG 1014 Asn Val Asn Ser Thr Ser Ser Ala Gly Asn Thr Ala Leu His Val Gly 310 315 320 GTG ATG CGC AAC CGC TTC GAC TGT GCC ATA GTG CTG CTG ACC CAC GGG 1062 Val Met Arg Asn Arg Phe Asp Cys Ala Ile Val Leu Leu Thr His Gly 325 330 335 340 GCC AAC GCG GAT GCC CGC GGA GAG CAC GGC AAC ACC CCG CTG CAC CTG 1110 Ala Asn Ala Asp Ala Arg Gly Glu His Gly Asn Thr Pro Leu His Leu 345 350 355 GCC ATG TCG AAA GAC AAC GTG GAG ATG ATC AAG GCC CTC ATC GTG TTC 1158 Ala Met Ser Lys Asp Asn Val Glu Met Ile Lys Ala Leu Ile Val Phe 360 365 370 GGA GCA GAA GTG GAC ACC CCG AAT GAC TTT GGG GAG ACT CCT ACA TTC 1206 Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu Thr Pro Thr Phe 375 380 385 CTA GCC TCC AAA ATC GGC AAA CTA CAG GAT CTC ATG CAC ATC TCA CGG 1254 Leu Ala Ser Lys Ile Gly Lys Leu Gln Asp Leu Met His Ile Ser Arg 390 395 400 GCC CGG AAG CCA GCG TTC ATC CTG GGC TCC ATG AGG GAC GAG AAG CGG 1302 Ala Arg Lys Pro Ala Phe Ile Leu Gly Ser Met Arg Asp Glu Lys Arg 405 410 415 420 ACC CAC GAC CAC CTG CTG TGC CTG GAT GGA GGA GGA GTG AAA GGC CTC 1350 Thr His Asp His Leu Leu Cys Leu Asp Gly Gly Gly Val Lys Gly Leu 425 430 435 ATC ATC ATC CAG CTC CTC ATC GCC ATC GAG AAG GCC TCG GGT GTG GCC 1398 Ile Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys Ala Ser Gly Val Ala 440 445 450 ACC AAG GAC CTG TTT GAC TGG GTG GCG GGC ACC AGC ACT GGA GGC ATC 1446 Thr Lys Asp Leu Phe Asp Trp Val Ala Gly Thr Ser Thr Gly Gly Ile 455 460 465 CTG GCC CTG GCC ATT CTG CAC AGT AAG TCC ATG GCC TAC ATG CGC GGC 1494 Leu Ala Leu Ala Ile Leu His Ser Lys Ser Met Ala Tyr Met Arg Gly 470 475 480 ATG TAC TTT CGC ATG AAG GAT GAG GTG TTC CGG GGC TCC AGG CCC TAC 1542 Met Tyr Phe Arg Met Lys Asp Glu Val Phe Arg Gly Ser Arg Pro Tyr 485 490 495 500 GAG TCG GGG CCC CTG GAG GAG TTC CTG AAG CGG GAG TTT GGG GAG CAC 1590 Glu Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg Glu Phe Gly Glu His 505 510 515 ACC AAG ATG ACG GAC GTC AGG AAA CCC AAG GTG ATG CTG ACA GGG ACA 1638 Thr Lys Met Thr Asp Val Arg Lys Pro Lys Val Met Leu Thr Gly Thr 520 525 530 CTG TCT GAC CGG CAG CCG GCT GAA CTC CAC CTC TTC CGG AAC TAC GAT 1686 Leu Ser Asp Arg Gln Pro Ala Glu Leu His Leu Phe Arg Asn Tyr Asp 535 540 545 GCT CCA GAA ACT GTC CGG GAG CCT CGT TTC AAC CAG AAC GTT AAC CTC 1734 Ala Pro Glu Thr Val Arg Glu Pro Arg Phe Asn Gln Asn Val Asn Leu 550 555 560 AGG CCT CCA GCT CAG CCC TCA GAC CAG CTG GTG TGG CGG GCG GCC CGA 1782 Arg Pro Pro Ala Gln Pro Ser Asp Gln Leu Val Trp Arg Ala Ala Arg 565 570 575 580 AGC AGC GGG GCA GCT CCT ACT TAC TTC CGA CCC AAT GGG CGC TTC CTG 1830 Ser Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro Asn Gly Arg Phe Leu 585 590 595 GAC GGT GGG CTG TTG GCC AAC AAC CCC ACG CTG GAT GCC ATG ACC GAG 1878 Asp Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu Asp Ala Met Thr Glu 600 605 610 ATC CAT GAG TAC AAT CAG GAC CTG ATC CGC AAG GGT CAG GCC AAC AAG 1926 Ile His Glu Tyr Asn Gln Asp Leu Ile Arg Lys Gly Gln Ala Asn Lys 615 620 625 GTG AAG AAA CTC TCC ATC GTT GTC TCC CTG GGG ACA GGG AGG TCC CCA 1974 Val Lys Lys Leu Ser Ile Val Val Ser Leu Gly Thr Gly Arg Ser Pro 630 635 640 CAA GTG CCT GTG ACC TGT GTG GAT GTC TTC CGT CCC AGC AAC CCC TGG 2022 Gln Val Pro Val Thr Cys Val Asp Val Phe Arg Pro Ser Asn Pro Trp 645 650 655 660 GAG CTG GCC AAG ACT GTT TTT GGG GCC AAG GAA CTG GGC AAG ATG GTG 2070 Glu Leu Ala Lys Thr Val Phe Gly Ala Lys Glu Leu Gly Lys Met Val 665 670 675 GTG GAC TGT TGC ACG GAT CCA GAC GGG CGG CCG GAATTC 2109 Val Asp Cys Cys Thr Asp Pro Asp Gly Arg Pro 680 685 (2) INFORMATION FOR SEQ ID NO:21: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 687 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:21: Met Gln Phe Phe Gly Arg Leu Val Asn Thr Phe Ser Gly Val Thr Asn 1 5 10 15 Leu Phe Ser Asn Pro Phe Arg Val Lys Glu Val Ala Val Ala Asp Tyr 20 25 30 Thr Ser Ser Asp Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln 35 40 45 Asn Thr Pro Asn Arg Thr Trp Asp Cys Val Leu Val Asn Pro Arg Asn 50 55 60 Ser Gln Ser Gly Phe Arg Leu Phe Gln Leu Glu Leu Glu Ala Asp Ala 65 70 75 80 Leu Val Asn Phe His Gln Tyr Ser Ser Gln Leu Leu Pro Phe Tyr Glu 85 90 95 Ser Ser Pro Gln Val Leu His Thr Glu Val Leu Gln His Leu Thr Asp 100 105 110 Leu Ile Arg Asn His Pro Ser Trp Ser Val Ala His Leu Ala Val Glu 115 120 125 Leu Gly Ile Arg Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala 130 135 140 Asn Cys Ala Glu Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys 145 150 155 160 Arg Lys Gly Asp Gly Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His 165 170 175 Thr Gln Met Asp Val Thr Asp Tyr Lys Gly Glu Thr Val Phe His Tyr 180 185 190 Ala Val Gln Gly Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Arg Asn 195 200 205 Ala Val Ala Gly Leu Asn Gln Val Asn Asn Gln Gly Leu Thr Pro Leu 210 215 220 His Leu Ala Cys Gln Leu Gly Lys Gln Glu Met Val Arg Val Leu Leu 225 230 235 240 Leu Cys Asn Ala Arg Cys Asn Ile Met Gly Pro Asn Gly Tyr Pro Ile 245 250 255 His Ser Ala Met Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile 260 265 270 Ser Met Asp Ser Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala 275 280 285 Ser Pro Leu His Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu 290 295 300 Lys Arg Gly Cys Asn Val Asn Ser Thr Ser Ser Ala Gly Asn Thr Ala 305 310 315 320 Leu His Val Gly Val Met Arg Asn Arg Phe Asp Cys Ala Ile Val Leu 325 330 335 Leu Thr His Gly Ala Asn Ala Asp Ala Arg Gly Glu His Gly Asn Thr 340 345 350 Pro Leu His Leu Ala Met Ser Lys Asp Asn Val Glu Met Ile Lys Ala 355 360 365 Leu Ile Val Phe Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu 370 375 380 Thr Pro Thr Phe Leu Ala Ser Lys Ile Gly Lys Leu Gln Asp Leu Met 385 390 395 400 His Ile Ser Arg Ala Arg Lys Pro Ala Phe Ile Leu Gly Ser Met Arg 405 410 415 Asp Glu Lys Arg Thr His Asp His Leu Leu Cys Leu Asp Gly Gly Gly 420 425 430 Val Lys Gly Leu Ile Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys Ala 435 440 445 Ser Gly Val Ala Thr Lys Asp Leu Phe Asp Trp Val Ala Gly Thr Ser 450 455 460 Thr Gly Gly Ile Leu Ala Leu Ala Ile Leu His Ser Lys Ser Met Ala 465 470 475 480 Tyr Met Arg Gly Met Tyr Phe Arg Met Lys Asp Glu Val Phe Arg Gly 485 490 495 Ser Arg Pro Tyr Glu Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg Glu 500 505 510 Phe Gly Glu His Thr Lys Met Thr Asp Val Arg Lys Pro Lys Val Met 515 520 525 Leu Thr Gly Thr Leu Ser Asp Arg Gln Pro Ala Glu Leu His Leu Phe 530 535 540 Arg Asn Tyr Asp Ala Pro Glu Thr Val Arg Glu Pro Arg Phe Asn Gln 545 550 555 560 Asn Val Asn Leu Arg Pro Pro Ala Gln Pro Ser Asp Gln Leu Val Trp 565 570 575 Arg Ala Ala Arg Ser Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro Asn 580 585 590 Gly Arg Phe Leu Asp Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu Asp 595 600 605 Ala Met Thr Glu Ile His Glu Tyr Asn Gln Asp Leu Ile Arg Lys Gly 610 615 620 Gln Ala Asn Lys Val Lys Lys Leu Ser Ile Val Val Ser Leu Gly Thr 625 630 635 640 Gly Arg Ser Pro Gln Val Pro Val Thr Cys Val Asp Val Phe Arg Pro 645 650 655 Ser Asn Pro Trp Glu Leu Ala Lys Thr Val Phe Gly Ala Lys Glu Leu 660 665 670 Gly Lys Met Val Val Asp Cys Cys Thr Asp Pro Asp Gly Arg Pro 675 680 685 (2) INFORMATION FOR SEQ ID NO:22: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2112 base pairs (B) TYPE: nucleic acid (C) STRANDEDNESS: double (D) TOPOLOGY: linear (ii) MOLECULE TYPE: cDNA (iii) HYPOTHETICAL: NO (ix) FEATURE: (A) NAME/KEY: CDS (B) LOCATION: 43..2106 (xi) SEQUENCE DESCRIPTION: SEQ ID NO:22: GAATTCCGGG ACGGTGGGGC CTCCCCACCT GCCCCGCAGA AG ATG CAG TTC TTT 54 Met Gln Phe Phe 1 GGC CGC CTG GTC AAT ACC TTC AGT GGC GTC ACC AAC TTG TTC TCT AAC 102 Gly Arg Leu Val Asn Thr Phe Ser Gly Val Thr Asn Leu Phe Ser Asn 5 10 15 20 CCA TTC CGG GTG AAG GAG GTG GCT GTG GCC GAC TAC ACC TCG AGT GAC 150 Pro Phe Arg Val Lys Glu Val Ala Val Ala Asp Tyr Thr Ser Ser Asp 25 30 35 CGA GTT CGG GAG GAA GGG CAG CTG ATT CTG TTC CAG AAC ACT CCC AAC 198 Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln Asn Thr Pro Asn 40 45 50 CGC ACC TGG GAC TGC GTC CTG GTC AAC CCC AGG AAC TCA CAG AGT GGA 246 Arg Thr Trp Asp Cys Val Leu Val Asn Pro Arg Asn Ser Gln Ser Gly 55 60 65 TTC CGA CTC TTC CAG CTG GAG TTG GAG GCT GAC GCC CTA GTG AAT TTC 294 Phe Arg Leu Phe Gln Leu Glu Leu Glu Ala Asp Ala Leu Val Asn Phe 70 75 80 CAT CAG TAT TCT TCC CAG CTG CTA CCC TTC TAT GAG AGC TCC CCT CAG 342 His Gln Tyr Ser Ser Gln Leu Leu Pro Phe Tyr Glu Ser Ser Pro Gln 85 90 95 100 GTC CTG CAC ACT GAG GTC CTG CAG CAC CTG ACC GAC CTC ATC CGT AAC 390 Val Leu His Thr Glu Val Leu Gln His Leu Thr Asp Leu Ile Arg Asn 105 110 115 CAC CCC AGC TGG TCA GTG GCC CAC CTG GCT GTG GAG CTA GGG ATC CGC 438 His Pro Ser Trp Ser Val Ala His Leu Ala Val Glu Leu Gly Ile Arg 120 125 130 GAG TGC TTC CAT CAC AGC CGT ATC ATC AGC TGT GCC AAT TGC GCG GAG 486 Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala Asn Cys Ala Glu 135 140 145 AAC GAG GAG GGC TGC ACA CCC CTG CAC CTG GCC TGC CGC AAG GGT GAT 534 Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys Arg Lys Gly Asp 150 155 160 GGG GAG ATC CTG GTG GAG CTG GTG CAG TAC TGC CAC ACT CAG ATG GAT 582 Gly Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His Thr Gln Met Asp 165 170 175 180 GTC ACC GAC TAC AAG GGA GAG ACC GTC TTC CAT TAT GCT GTC CAG GGT 630 Val Thr Asp Tyr Lys Gly Glu Thr Val Phe His Tyr Ala Val Gln Gly 185 190 195 GAC AAT TCT CAG GTG CTG CAG CTC CTT GGA AGG AAC GCA GTG GCT GGC 678 Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Arg Asn Ala Val Ala Gly 200 205 210 CTG AAC CAG GTG AAT AAC CAA GGG CTG ACC CCG CTG CAC CTG GCC TGC 726 Leu Asn Gln Val Asn Asn Gln Gly Leu Thr Pro Leu His Leu Ala Cys 215 220 225 CAG CTG GGG AAG CAG GAG ATG GTC CGC GTG CTG CTG CTG TGC AAT GCT 774 Gln Leu Gly Lys Gln Glu Met Val Arg Val Leu Leu Leu Cys Asn Ala 230 235 240 CGG TGC AAC ATC ATG GGC CCC AAC GGC TAC CCC ATC CAC TCG GCC ATG 822 Arg Cys Asn Ile Met Gly Pro Asn Gly Tyr Pro Ile His Ser Ala Met 245 250 255 260 AAG TTC TCT CAG AAG GGG TGT GCG GAG ATG ATC ATC AGC ATG GAC AGC 870 Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile Ser Met Asp Ser 265 270 275 AGC CAG ATC CAC AGC AAA GAC CCC CGT TAC GGA GCC AGC CCC CTC CAC 918 Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala Ser Pro Leu His 280 285 290 TGG GCC AAG AAC GCA GAG ATG GCC CGC ATG CTG CTG AAA CGG GGC TGC 966 Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu Lys Arg Gly Cys 295 300 305 AAC GTG AAC AGC ACC AGC TCC GCG GGG AAC ACG GCC CTG CAC GTG GGG 1014 Asn Val Asn Ser Thr Ser Ser Ala Gly Asn Thr Ala Leu His Val Gly 310 315 320 GTG ATG CGC AAC CGC TTC GAC TGT GCC ATA GTG CTG CTG ACC CAC GGG 1062 Val Met Arg Asn Arg Phe Asp Cys Ala Ile Val Leu Leu Thr His Gly 325 330 335 340 GCC AAC GCG GAT GCC CGC GGA GAG CAC GGC AAC ACC CCG CTG CAC CTG 1110 Ala Asn Ala Asp Ala Arg Gly Glu His Gly Asn Thr Pro Leu His Leu 345 350 355 GCC ATG TCG AAA GAC AAC GTG GAG ATG ATC AAG GCC CTC ATC GTG TTC 1158 Ala Met Ser Lys Asp Asn Val Glu Met Ile Lys Ala Leu Ile Val Phe 360 365 370 GGA GCA GAA GTG GAC ACC CCG AAT GAC TTT GGG GAG ACT CCT ACA TTC 1206 Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu Thr Pro Thr Phe 375 380 385 CTA GCC TCC AAA ATC GGC AGA CAA CTA CAG GAT CTC ATG CAC ATC TCA 1254 Leu Ala Ser Lys Ile Gly Arg Gln Leu Gln Asp Leu Met His Ile Ser 390 395 400 CGG GCC CGG AAG CCA GCG TTC ATC CTG GGC TCC ATG AGG GAC GAG AAG 1302 Arg Ala Arg Lys Pro Ala Phe Ile Leu Gly Ser Met Arg Asp Glu Lys 405 410 415 420 CGG ACC CAC GAC CAC CTG CTG TGC CTG GAT GGA GGA GGA GTG AAA GGC 1350 Arg Thr His Asp His Leu Leu Cys Leu Asp Gly Gly Gly Val Lys Gly 425 430 435 CTC ATC ATC ATC CAG CTC CTC ATC GCC ATC GAG AAG GCC TCG GGT GTG 1398 Leu Ile Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys Ala Ser Gly Val 440 445 450 GCC ACC AAG GAC CTG TTT GAC TGG GTG GCG GGC ACC AGC ACT GGA GGC 1446 Ala Thr Lys Asp Leu Phe Asp Trp Val Ala Gly Thr Ser Thr Gly Gly 455 460 465 ATC CTG GCC CTG GCC ATT CTG CAC AGT AAG TCC ATG GCC TAC ATG CGC 1494 Ile Leu Ala Leu Ala Ile Leu His Ser Lys Ser Met Ala Tyr Met Arg 470 475 480 GGC ATG TAC TTT CGC ATG AAG GAT GAG GTG TTC CGG GGC TCC AGG CCC 1542 Gly Met Tyr Phe Arg Met Lys Asp Glu Val Phe Arg Gly Ser Arg Pro 485 490 495 500 TAC GAG TCG GGG CCC CTG GAG GAG TTC CTG AAG CGG GAG TTT GGG GAG 1590 Tyr Glu Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg Glu Phe Gly Glu 505 510 515 CAC ACC AAG ATG ACG GAC GTC AGG AAA CCC AAG GTG ATG CTG ACA GGG 1638 His Thr Lys Met Thr Asp Val Arg Lys Pro Lys Val Met Leu Thr Gly 520 525 530 ACA CTG TCT GAC CGG CAG CCG GCT GAA CTC CAC CTC TTC CGG AAC TAC 1686 Thr Leu Ser Asp Arg Gln Pro Ala Glu Leu His Leu Phe Arg Asn Tyr 535 540 545 GAT GCT CCA GAA ACT GTC CGG GAG CCT CGT TTC AAC CAG AAC GTT AAC 1734 Asp Ala Pro Glu Thr Val Arg Glu Pro Arg Phe Asn Gln Asn Val Asn 550 555 560 CTC AGG CCT CCA GCT CAG CCC TCA GAC CAG CTG GTG TGG CGG GCG GCC 1782 Leu Arg Pro Pro Ala Gln Pro Ser Asp Gln Leu Val Trp Arg Ala Ala 565 570 575 580 CGA AGC AGC GGG GCA GCT CCT ACT TAC TTC CGA CCC AAT GGG CGC TTC 1830 Arg Ser Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro Asn Gly Arg Phe 585 590 595 CTG GAC GGT GGG CTG TTG GCC AAC AAC CCC ACG CTG GAT GCC ATG ACC 1878 Leu Asp Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu Asp Ala Met Thr 600 605 610 GAG ATC CAT GAG TAC AAT CAG GAC CTG ATC CGC AAG GGT CAG GCC AAC 1926 Glu Ile His Glu Tyr Asn Gln Asp Leu Ile Arg Lys Gly Gln Ala Asn 615 620 625 AAG GTG AAG AAA CTC TCC ATC GTT GTC TCC CTG GGG ACA GGG AGG TCC 1974 Lys Val Lys Lys Leu Ser Ile Val Val Ser Leu Gly Thr Gly Arg Ser 630 635 640 CCA CAA GTG CCT GTG ACC TGT GTG GAT GTC TTC CGT CCC AGC AAC CCC 2022 Pro Gln Val Pro Val Thr Cys Val Asp Val Phe Arg Pro Ser Asn Pro 645 650 655 660 TGG GAG CTG GCC AAG ACT GTT TTT GGG GCC AAG GAA CTG GGC AAG ATG 2070 Trp Glu Leu Ala Lys Thr Val Phe Gly Ala Lys Glu Leu Gly Lys Met 665 670 675 GTG GTG GAC TGT TGC ACG GAT CCA GAC GGG CGG CCG GAATTC 2112 Val Val Asp Cys Cys Thr Asp Pro Asp Gly Arg Pro 680 685 (2) INFORMATION FOR SEQ ID NO:23: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 688 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: protein (xi) SEQUENCE DESCRIPTION: SEQ ID NO:23: Met Gln Phe Phe Gly Arg Leu Val Asn Thr Phe Ser Gly Val Thr Asn 1 5 10 15 Leu Phe Ser Asn Pro Phe Arg Val Lys Glu Val Ala Val Ala Asp Tyr 20 25 30 Thr Ser Ser Asp Arg Val Arg Glu Glu Gly Gln Leu Ile Leu Phe Gln 35 40 45 Asn Thr Pro Asn Arg Thr Trp Asp Cys Val Leu Val Asn Pro Arg Asn 50 55 60 Ser Gln Ser Gly Phe Arg Leu Phe Gln Leu Glu Leu Glu Ala Asp Ala 65 70 75 80 Leu Val Asn Phe His Gln Tyr Ser Ser Gln Leu Leu Pro Phe Tyr Glu 85 90 95 Ser Ser Pro Gln Val Leu His Thr Glu Val Leu Gln His Leu Thr Asp 100 105 110 Leu Ile Arg Asn His Pro Ser Trp Ser Val Ala His Leu Ala Val Glu 115 120 125 Leu Gly Ile Arg Glu Cys Phe His His Ser Arg Ile Ile Ser Cys Ala 130 135 140 Asn Cys Ala Glu Asn Glu Glu Gly Cys Thr Pro Leu His Leu Ala Cys 145 150 155 160 Arg Lys Gly Asp Gly Glu Ile Leu Val Glu Leu Val Gln Tyr Cys His 165 170 175 Thr Gln Met Asp Val Thr Asp Tyr Lys Gly Glu Thr Val Phe His Tyr 180 185 190 Ala Val Gln Gly Asp Asn Ser Gln Val Leu Gln Leu Leu Gly Arg Asn 195 200 205 Ala Val Ala Gly Leu Asn Gln Val Asn Asn Gln Gly Leu Thr Pro Leu 210 215 220 His Leu Ala Cys Gln Leu Gly Lys Gln Glu Met Val Arg Val Leu Leu 225 230 235 240 Leu Cys Asn Ala Arg Cys Asn Ile Met Gly Pro Asn Gly Tyr Pro Ile 245 250 255 His Ser Ala Met Lys Phe Ser Gln Lys Gly Cys Ala Glu Met Ile Ile 260 265 270 Ser Met Asp Ser Ser Gln Ile His Ser Lys Asp Pro Arg Tyr Gly Ala 275 280 285 Ser Pro Leu His Trp Ala Lys Asn Ala Glu Met Ala Arg Met Leu Leu 290 295 300 Lys Arg Gly Cys Asn Val Asn Ser Thr Ser Ser Ala Gly Asn Thr Ala 305 310 315 320 Leu His Val Gly Val Met Arg Asn Arg Phe Asp Cys Ala Ile Val Leu 325 330 335 Leu Thr His Gly Ala Asn Ala Asp Ala Arg Gly Glu His Gly Asn Thr 340 345 350 Pro Leu His Leu Ala Met Ser Lys Asp Asn Val Glu Met Ile Lys Ala 355 360 365 Leu Ile Val Phe Gly Ala Glu Val Asp Thr Pro Asn Asp Phe Gly Glu 370 375 380 Thr Pro Thr Phe Leu Ala Ser Lys Ile Gly Arg Gln Leu Gln Asp Leu 385 390 395 400 Met His Ile Ser Arg Ala Arg Lys Pro Ala Phe Ile Leu Gly Ser Met 405 410 415 Arg Asp Glu Lys Arg Thr His Asp His Leu Leu Cys Leu Asp Gly Gly 420 425 430 Gly Val Lys Gly Leu Ile Ile Ile Gln Leu Leu Ile Ala Ile Glu Lys 435 440 445 Ala Ser Gly Val Ala Thr Lys Asp Leu Phe Asp Trp Val Ala Gly Thr 450 455 460 Ser Thr Gly Gly Ile Leu Ala Leu Ala Ile Leu His Ser Lys Ser Met 465 470 475 480 Ala Tyr Met Arg Gly Met Tyr Phe Arg Met Lys Asp Glu Val Phe Arg 485 490 495 Gly Ser Arg Pro Tyr Glu Ser Gly Pro Leu Glu Glu Phe Leu Lys Arg 500 505 510 Glu Phe Gly Glu His Thr Lys Met Thr Asp Val Arg Lys Pro Lys Val 515 520 525 Met Leu Thr Gly Thr Leu Ser Asp Arg Gln Pro Ala Glu Leu His Leu 530 535 540 Phe Arg Asn Tyr Asp Ala Pro Glu Thr Val Arg Glu Pro Arg Phe Asn 545 550 555 560 Gln Asn Val Asn Leu Arg Pro Pro Ala Gln Pro Ser Asp Gln Leu Val 565 570 575 Trp Arg Ala Ala Arg Ser Ser Gly Ala Ala Pro Thr Tyr Phe Arg Pro 580 585 590 Asn Gly Arg Phe Leu Asp Gly Gly Leu Leu Ala Asn Asn Pro Thr Leu 595 600 605 Asp Ala Met Thr Glu Ile His Glu Tyr Asn Gln Asp Leu Ile Arg Lys 610 615 620 Gly Gln Ala Asn Lys Val Lys Lys Leu Ser Ile Val Val Ser Leu Gly 625 630 635 640 Thr Gly Arg Ser Pro Gln Val Pro Val Thr Cys Val Asp Val Phe Arg 645 650 655 Pro Ser Asn Pro Trp Glu Leu Ala Lys Thr Val Phe Gly Ala Lys Glu 660 665 670 Leu Gly Lys Met Val Val Asp Cys Cys Thr Asp Pro Asp Gly Arg Pro 675 680 685 (2) INFORMATION FOR SEQ ID NO:24: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 21 bases (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: oligonucleotides (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:24: CATGGGACCC GCTGGCTTTC C 21 (2) INFORMATION FOR SEQ ID NO:25: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 bases (B) TYPE: nucleic acid (C) STRANDEDNESS: single (D) TOPOLOGY: linear (ii) MOLECULE TYPE: oligonucleotides (iii) HYPOTHETICAL: NO (xi) SEQUENCE DESCRIPTION: SEQ ID NO:25: GGCAGGAACC GCCACTGGGG GC 22 

What is claimed is:
 1. A composition comprising a peptide comprising an amino acid sequence selected from the group consisting of: (a) the amino acid sequence of SEQ ID NO:17; (b) a fragment of the amino acid sequence of SEQ ID NO:17 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (c) the amino acid sequence of SEQ ID NO:19; (d) a fragment of the amino acid sequence of SEQ ID NO:19 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (e) the amino acid sequence of SEQ ID NO:21; (f) a fragment of the amino acid sequence of SEQ ID NO:21 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; (g) the amino acid sequence of SEQ ID NO:23; and (h) a fragment of the amino acid sequence of SEQ ID NO:23 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine.
 2. The composition of claim 1, wherein said peptide comprises the amino acid sequence of SEQ ID NO:17.
 3. The composition of claim 1, wherein said peptide comprises the amino acid sequence of SEQ ID NO:19.
 4. The composition of claim 1, wherein said peptide comprises the amino acid sequence of SEQ ID NO:21.
 5. The composition of claim 1, wherein said peptide comprises the amino acid sequence of SEQ ID NO:23.
 6. An isolated polypeptide comprising an amino acid sequence selected from the group consisting of: a) the amino acid sequence of SEQ ID NO:17; b) a fragment of the amino acid sequence of SEQ ID NO:17 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; c) the amino acid sequence of SEQ ID NO:19; d) a fragment of the amino acid sequence of SEQ ID NO:19 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; e) the amino acid sequence of SEQ ID NO:21; f) a fragment of the amino acid sequence of SEQ ID NO:21 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine; g) the amino acid sequence of SEQ ID NO:23; and h) a fragment of the amino acid sequence of SEQ ID NO:23 having activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine.
 7. The polypeptide of claim 6, wherein said polypeptide comprises the amino acid sequence of SEQ ID NO:17.
 8. The polypeptide of claim 6, wherein said polypeptide comprises the amino acid sequence of SEQ ID NO:19.
 9. The polypeptide of claim 6, wherein said polypeptide comprises the amino acid sequence of SEQ ID NO:21.
 10. The polypeptide of claim 6, wherein said polypeptide comprises the amino acid sequence of SEQ ID NO:23.
 11. An isolated polypeptide encoded by a nucleic acid molecule comprising the nucleotide sequence of SEQ ID NO:16, SEQ ID NO:18, SEQ ID NO:20, SEQ ID NO:22, the DNA insert of the plasmid deposited with ATCC as Accession Number 69948 or 69949, or a complement thereof.
 12. An isolated polypeptide comprising the amino acid sequence of SEQ ID NO:17, SEQ ID NO:19, SEQ ID NO:21, SEQ ID NO:23, or an amino acid sequence encoded by the DNA insert of the plasmid deposited with ATCC as Accession Number 69948 or
 69949. 13. An isolated naturally-occurring allelic variant of a polypeptide comprising the amino acid sequence of SEQ ID NO: 17, SEQ ID NO: 19, SEQ ID NO: 21, SEQ ID NO: 23, or an amino acid sequence encoded by the DNA insert of the plasmid deposited with ATCC as Accession Number 69948 or 69949, wherein the allelic variant has activity in a mixed micelle assay with 1-palmitoyl-2-[¹⁴C]-arachidonyl-phosphatidylcholine, and is encoded by a nucleic acid molecule which hybridizes to a compliment of a nucleic acid molecule comprising SEQ ID NO: 16, SEQ ID NO: 18, SEQ ID NO: 20, or SEQ ID NO: 22 under stringent conditions. 